The best greenhouse temperature controllers balance reliable heating and cooling with controls that suit your setup. My best overall pick is the Inkbird ITC-308, a practical dual-stage choice for growers who need one controller to operate both a heater and a cooling device. The Inkbird ITC-308 with IHC-200 adds humidity control, while the DEWENWILS Smart Wi-Fi Controller is a stronger fit for growers who want remote access. The main tradeoffs are simple plug-in operation versus added connectivity, and basic temperature control versus managing several climate factors. Read on for the full breakdown of all 15 options and how to match a controller to your greenhouse.
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Key Takeaways
- Dual-stage heating and cooling is the clearest all-around advantage: the Inkbird ITC-308 and VIVOSUN controller are better suited to setups where one device must switch between a heater and a cooling load than single-purpose thermostats.
- Temperature and humidity control are separate needs: the Inkbird ITC-308 paired with the IHC-200 stands apart for growers who want both readings and controls, but it adds another device and more setup.
- Wi-Fi is useful for visibility, not a substitute for safe installation: the DEWENWILS and Inkbird Wi-Fi options suit remote monitoring, while a standard plug-in controller may be easier to manage locally.
- Probe protection matters in a damp greenhouse: the waterproof SENSTREE and DIGITEN models address moisture exposure better than options without an explicit waterproof positioning.
- Several listings serve similar basic jobs: the Inkbird ITC-308 variants and multiple single-outlet thermostats overlap, so buyers should choose by control mode, connectivity, and installation fit rather than brand or model naming alone.
| Inkbird ITC-308 Digital Temperature Controller for Heating and Cooling |  | Best Overall | Model: ITC-308 | Control modes: Heating and cooling | Voltage: 110 V, 240 V (listed) | VIEW LATEST PRICE | See Our Full Breakdown |
| WILLHI WH2408 Digital Temperature Controller, 10A, 1200W |  | Best for Fine Temperature Adjustments | Model: WH2408 | Control modes: Heating and cooling | Probe range: -58°F to 230°F (-50°C to 110°C) | VIEW LATEST PRICE | See Our Full Breakdown |
| VIVOSUN 1500W Digital Temperature Controller with Heating and Cooling Modes |  | Best for Separate Heating and Cooling Setpoints | Model: TC-0001 | Control modes: Heating and cooling | Output: Dual relay | VIEW LATEST PRICE | See Our Full Breakdown |
| Diymore Digital Plug-In Thermostat Controller, 1800W, -40°F to 248°F |  | Best for Higher Listed Load Capacity | Control modes: Heating and cooling; 5 modes | Temperature range: -40°F to 248°F | Temperature precision: ±1°F | VIEW LATEST PRICE | See Our Full Breakdown |
| BN-LINK Digital Cooling Thermostat Temperature Controller |  | Best for Cooling-Only Greenhouses | Model: BNQ-T7B(C) | Control type: Cooling only | Temperature range: 40–108°F | VIEW LATEST PRICE | See Our Full Breakdown |
| BN-LINK Digital Reptile Thermostat Temperature Controller |  | Best for Seedling Mats and Simple Heating | Temperature range: 40–108°F | Maximum load: 1000W (8.3A) | Voltage: 120VAC, 60Hz | VIEW LATEST PRICE | See Our Full Breakdown |
| Inkbird ITC-306T Aquarium Temperature Controller |  | Best for Day-and-Night Heating Schedules | Model: ITC-306T-LW | Outlets: 2 heating outlets | Display: Dual LCD displays | VIEW LATEST PRICE | See Our Full Breakdown |
| Inkbird ITC-308 Temperature Controller with IHC-200 Humidity Controller |  | Best for Temperature and Humidity Management | Included units: ITC-308 temperature controller and IHC-200 humidity controller | Number of items: 2 | Temperature control: Heating and cooling | VIEW LATEST PRICE | See Our Full Breakdown |
| DEWENWILS Smart Wi-Fi Temperature Controller with Memory |  | Best for Remote Control and Scheduling | Connectivity: Wi-Fi | Control method: App | Voltage: 120 volts | VIEW LATEST PRICE | See Our Full Breakdown |
| SENSTREE Waterproof Digital Temperature Controller, 110V, 10A, 1100W |  | Best for Damp Greenhouse Conditions | Model: DTC310ZJ-JP | Voltage: Listed as 110V and 220V | Current: 10A | VIEW LATEST PRICE | See Our Full Breakdown |
| KETOTEK Digital Thermostat Outlet Plug with Temperature Probe |  | Best for Flexible Plug-In Control | Model: KT3100 | Power supply: 100–250V AC | Maximum output: 15A at 120V | VIEW LATEST PRICE | See Our Full Breakdown |
| DIGITEN DTC310 Waterproof Temperature Controller, 10A Digital Thermostat |  | Best for Damp Greenhouse Conditions | Model: DTC-310 | Temperature range: -40°F to 248°F (-40°C to 120°C) | Water resistance: IP65 | VIEW LATEST PRICE | See Our Full Breakdown |
| Luxbird Digital Temperature Controller LB-2SC – Thermostat Outlet for Reptile Terrarium, Greenhouse & Grow Tent (Green) |  | Best for Two Small Growing Zones | Model: LB-2SC | Input voltage: 120V | Operating temperature range: 32°F to 113°F (0°C to 45°C) | VIEW LATEST PRICE | See Our Full Breakdown |
| Inkbird ITC-308 WiFi Temperature Controller |  | Best for Remote Greenhouse Monitoring | Model: ITC-308-WIFI-LW | Connectivity: 2.4 GHz Wi-Fi | Voltage: 110V | VIEW LATEST PRICE | See Our Full Breakdown |
| Inkbird WiFi ITC-308 Digital Temperature Controller |  | Best for App-Controlled Heating and Cooling | Model: ITC-308-US | Connectivity: 2.4 GHz Wi-Fi | Voltage: 110V | VIEW LATEST PRICE | See Our Full Breakdown |
| greenhouse temperature controller | Display | Model | Voltage |
|---|---|---|---|
| Inkbird ITC-308 Digital Temper | LCD; Celsius or Fahrenheit | ITC-308 | 110 V, 240 V (listed) |
| WILLHI WH2408 Digital Temperat | — | WH2408 | — |
| VIVOSUN 1500W Digital Temperat | Dual LED; Celsius or Fahrenheit | TC-0001 | 110 V, 240 V (listed) |
| Diymore Digital Plug-In Thermo | LED | — | 220 V |
| BN-LINK Digital Cooling Thermo | LED; Fahrenheit or Celsius | BNQ-T7B(C) | 120 VAC, 60 Hz |
| BN-LINK Digital Reptile Thermo | LED | — | 120VAC, 60Hz |
| Inkbird ITC-306T Aquarium Temp | Dual LCD displays | ITC-306T-LW | — |
| Inkbird ITC-308 Temperature Co | LCD or LED | — | 120 volts |
| DEWENWILS Smart Wi-Fi Temperat | — | — | 120 volts |
| SENSTREE Waterproof Digital Te | LCD | DTC310ZJ-JP | Listed as 110V and 220V |
| KETOTEK Digital Thermostat Out | — | KT3100 | — |
| DIGITEN DTC310 Waterproof Temp | Illuminated LED | DTC-310 | — |
| Luxbird Digital Temperature Co | LCD | LB-2SC | — |
| Inkbird ITC-308 WiFi Temperatu | LCD | ITC-308-WIFI-LW | 110V |
| Inkbird WiFi ITC-308 Digital T | Digital | ITC-308-US | 110V |
More Details on Our Top Picks
Inkbird ITC-308 Digital Temperature Controller for Heating and Cooling
I’d choose the Inkbird ITC-308 as the most balanced option for a greenhouse that needs both heating and cooling managed from one controller. It switches between two connected appliances as temperatures change, so it can support a heater for cool nights and a fan or cooler for warm spells. Compared with the BN-LINK Digital Cooling Thermostat, which only controls cooling, the Inkbird is more adaptable across changing seasons. Its calibratable probe and Celsius/Fahrenheit display also help growers match readings to their preferred monitoring setup. The tradeoff is that it does not include heating or cooling equipment, and the supplied specifications list both 110 V and 240 V without clarifying which version applies. I’d verify electrical compatibility before connecting greenhouse appliances.
Pros:- Can control heating and cooling equipment through separate connections
- Probe calibration allows adjustment of the displayed temperature
- Shows temperature in either Celsius or Fahrenheit
- Useful across greenhouse and other temperature-controlled setups
Cons:- Requires separate heating and cooling appliances
- Voltage listings vary between 110 V and 240 V, so buyers need to confirm the version
- Listed maximum power is 1200 W, which may limit appliance choices
Best for: Greenhouse growers who want one plug-in controller to switch between separate heating and cooling equipment as seasons change.
Not ideal for: Buyers seeking an all-in-one climate unit, app-based control, or a controller whose voltage compatibility is clear without checking the specific version.
- Model:ITC-308
- Control modes:Heating and cooling
- Voltage:110 V, 240 V (listed)
- Maximum power:1200 W
- Display:LCD; Celsius or Fahrenheit
- Probe:Temperature probe; calibration supported
- Material:Plastic
- Dimensions:1.65 × 0.94 × 3.35 in
Our verdict“I’d pick the ITC-308 for flexible, two-season greenhouse control, provided its voltage and load limits match the appliances.”
WILLHI WH2408 Digital Temperature Controller, 10A, 1200W
The WILLHI WH2408 suits growers who want small temperature increments and a probe rated for a broad range. Its 0.1°F control resolution offers finer adjustment steps than the Diymore controller’s stated ±1°F precision, which may appeal when tending temperature-sensitive plants or managing narrow setpoints. The waterproof probe is another practical advantage around humid greenhouse conditions, though the controller housing itself must stay dry. Like the Inkbird ITC-308, it can run heating and cooling equipment, but the WILLHI adds power-loss setting memory. That helps avoid re-entering settings after an outage; it does not make the unit a safety device. I’d only connect equipment with its own thermal and overload protection, and I’d avoid prolonged saltwater exposure to the probe.
Pros:- Supports both heating and cooling modes
- 0.1°F control resolution allows fine setpoint adjustments
- Waterproof food-grade probe suits damp measuring locations
- Remembers settings after power loss
Cons:- Controller housing is not waterproof and needs a dry location
- Connected equipment must have its own thermal and overload protection
- Extended saltwater use may shorten probe life
Best for: Growers who prefer fine Fahrenheit adjustment steps, want settings retained after an outage, and can keep the controller housing sheltered.
Not ideal for: Greenhouse owners who need a waterproof controller body, built-in appliance safety protection, or a probe intended for extended saltwater use.
- Model:WH2408
- Control modes:Heating and cooling
- Probe range:-58°F to 230°F (-50°C to 110°C)
- Controller ambient range:-4°F to 140°F (-20°C to 60°C)
- Control resolution:0.1°F
- Probe:Food-grade, waterproof temperature probe
- Setting memory:Retains settings after power loss
Our verdict“I’d choose the WH2408 for fine temperature adjustments and outage memory if I can protect its housing and use independently protected equipment.”
VIVOSUN 1500W Digital Temperature Controller with Heating and Cooling Modes
The VIVOSUN TC-0001 is a strong fit for a greenhouse where heating and cooling need their own switching thresholds. Its separate differential settings let growers set distinct behavior for each mode, while the dual LED display shows measured and target temperatures together. That gives it a more informative control panel than the basic LCD presentation of the Inkbird ITC-308. The six-foot waterproof probe offers extra placement flexibility, and sensor-fault alerts and compressor-delay protection add useful safeguards for connected equipment. Its 1500 W rating exceeds the Inkbird’s listed 1200 W limit, although buyers still need to match the controller to each appliance’s electrical requirements. This is a wired, wall-mount design rather than the simplest outlet-style option, so installation and placement need more planning.
Pros:- Separate differential settings for heating and cooling
- Dual LED display shows measured and set temperatures together
- Six-foot waterproof sensor probe offers flexible placement
- Includes temperature and sensor-fault alerts plus compressor-delay protection
Cons:- Wired wall-mount format requires more deliberate installation than a simple plug-in controller
- Listed voltage includes 110 V and 240 V, so buyers should confirm the applicable version
- Still requires separate heating and cooling appliances
Best for: Greenhouse growers who want separate heating and cooling thresholds, visible live and target readings, and a wall-mounted controller.
Not ideal for: Buyers who want a compact plug-in unit with minimal setup, or who need wireless control rather than a corded wall-mount controller.
- Model:TC-0001
- Control modes:Heating and cooling
- Output:Dual relay
- Power:1500 W
- Voltage:110 V, 240 V (listed)
- Display:Dual LED; Celsius or Fahrenheit
- Sensor probe:Waterproof, 6 ft
- Mounting:Wall mount
- Control range:-58°F to 248°F
Our verdict“I’d favor the VIVOSUN when separate mode thresholds and a more informative display matter more than plug-in simplicity.”
Diymore Digital Plug-In Thermostat Controller, 1800W, -40°F to 248°F
For buyers comparing listed wattage, the Diymore plug-in thermostat stands out with an 1800 W maximum, higher than the 1200 W Inkbird ITC-308 and the 1500 W VIVOSUN. That can widen the choice of compatible greenhouse appliances, though the actual appliance load and the stated 220 V supply still need to match the controller. Its plug-in format avoids wiring, and the six-foot sensor cord gives some freedom to position the probe away from the outlet. The controller supports heating and cooling, retains settings after an outage, and offers five control modes. Compared with the WILLHI WH2408, however, its documented precision is ±1°F rather than 0.1°F resolution. Push-button operation also means no app control, and the product data does not describe alerts or protection features.
Pros:- Supports both heating and cooling
- Listed maximum wattage of 1800 W exceeds the Inkbird and VIVOSUN figures
- Plug-in setup requires no wiring
- Settings memory helps retain configuration after power outages
Cons:- Listed voltage is 220 V, which may not match a buyer’s greenhouse supply
- Push-button controls offer no app-based operation
- ±1°F precision is less finely specified than the WILLHI’s 0.1°F resolution
Best for: Growers with compatible 220 V equipment who want a plug-in heating-and-cooling controller with a higher listed wattage limit.
Not ideal for: Buyers on a different supply voltage, those seeking app control, or growers who need documented alarms and equipment protection features.
- Control modes:Heating and cooling; 5 modes
- Temperature range:-40°F to 248°F
- Temperature precision:±1°F
- Maximum wattage:1800 W
- Voltage:220 V
- Display:LED
- Sensor cord:6 ft
- Timer:Up to 99 hours
Our verdict“I’d consider the Diymore for compatible 220 V setups that need its higher listed load capacity, but not for app control or fine-resolution adjustments.”
BN-LINK Digital Cooling Thermostat Temperature Controller
The BN-LINK Digital Cooling Thermostat is the straightforward pick for a greenhouse that needs a fan or other cooling device switched by temperature, not a controller for both sides of the climate equation. Its cooling-only operation makes the setup narrower than the Inkbird ITC-308 or VIVOSUN TC-0001, which can also manage heating. That limitation is an advantage if the only goal is to prevent overheating and the grower does not need a heater controlled by the same unit. The LED status indicators make it easy to see when cooling is active, and the display supports Celsius or Fahrenheit. Its 1000 W, 8.3 A limit is the lowest listed capacity in this group, so I’d check the fan’s electrical draw before connecting it.
Pros:- Simple cooling-only control suits fans and similar appliances
- LED indicators show power and cooling status
- Temperature display supports Fahrenheit and Celsius
- Includes a temperature probe and a 3.94-foot power cord
Cons:- Cannot control heating equipment, unlike the Inkbird ITC-308 and VIVOSUN TC-0001
- Maximum load is limited to 8.3 A and 1000 W
- Listed operating voltage is 120 VAC, 60 Hz
Best for: Greenhouse owners who only need temperature-triggered control of a fan or other cooling appliance on a 120 V supply.
Not ideal for: Growers who need heater control, a higher-capacity connection, or one controller to manage both hot and cold conditions.
- Model:BNQ-T7B(C)
- Control type:Cooling only
- Temperature range:40–108°F
- Voltage:120 VAC, 60 Hz
- Maximum load:8.3 A, 1000 W
- Display:LED; Fahrenheit or Celsius
- Power cord length:3.94 ft
- Probe length:4.92 ft
Our verdict“I’d choose this BN-LINK model for a cooling-only greenhouse setup when its 120 V and 1000 W limits fit the appliance.”
BN-LINK Digital Reptile Thermostat Temperature Controller
I’d choose the BN-LINK BNQ-T7H for a small greenhouse setup that needs straightforward heat control, such as a seedling mat or heat lamp. Its 40–108°F range covers common propagation temperatures, while the probe and clear LED display make it easier to monitor conditions than a thermostat without a live readout. Compared with the Inkbird ITC-306T, it has a lower maximum temperature range and lacks separate day and night settings, but its simple three-button operation suits growers who want basic heating without extra programming. The main limitation is functional: it controls heating devices only, so it cannot run a fan or cooling unit when a greenhouse overheats. Its short cords may also restrict where the controller and probe can sit.
Pros:- Works with seedling mats, heat lamps, and other heating devices
- LED display and status lights are easy to read
- Includes a temperature probe and hanging tab
- Supports Fahrenheit and Celsius settings
Cons:- Controls heating only, with no cooling function
- 40–108°F range is narrower than the Inkbird ITC-306T’s stated range
- Short 3.94-foot power cord and 4.92-foot probe limit placement
Best for: Greenhouse beginners using a seedling mat or heat lamp who want a simple thermostat with an easy-to-read display.
Not ideal for: Growers who need cooling control, overnight temperature schedules, or probe placement far from the outlet.
- Temperature range:40–108°F
- Maximum load:1000W (8.3A)
- Voltage:120VAC, 60Hz
- Controller type:Push button
- Display:LED
- Power cord length:3.94 ft
- Temperature probe length:4.92 ft
- Safety listing:ETL listed
Our verdict“Pick the BN-LINK if you need uncomplicated thermostat control for greenhouse heating, but skip it if you also need active cooling.”
Inkbird ITC-306T Aquarium Temperature Controller
The Inkbird ITC-306T stands out for greenhouse growers who want distinct day and night heat targets without stepping up to a full temperature-and-humidity kit. Its two heating outlets and separate schedules can coordinate compatible heaters around changing overnight needs, while dual LCD displays show the measured and set temperatures together. That schedule flexibility gives it an advantage over the simpler BN-LINK BNQ-T7H, which offers basic heating control but no day/night settings. The ITC-306T also adds calibration and alarms for overheating or sensor faults. Its boundary is just as clear: it is a heating-only controller, not a solution for running ventilation or cooling equipment. The controller itself is not specified as waterproof, so greenhouse placement needs protection from moisture.
Pros:- Separate day and night temperature settings
- Two heating outlets
- Dual LCDs show measured and set temperatures at once
- Includes calibration and over-temperature and sensor-fault alarms
Cons:- Heating only; it cannot control cooling equipment
- Controller is not specified as waterproof
- Day/night scheduling adds complexity compared with the BN-LINK BNQ-T7H
Best for: Growers who use heaters and need separate daytime and nighttime temperature settings, plus alarms for sensor or overheating issues.
Not ideal for: Greenhouse owners seeking one controller for both heating and cooling, or anyone who needs an explicitly waterproof control unit.
- Model:ITC-306T-LW
- Outlets:2 heating outlets
- Display:Dual LCD displays
- Temperature range:Up to 210°F
- Resolution:0.1°F
- Response time:500 milliseconds
- Probe immersion depth:6.56 feet
- Power source:Corded electric
Our verdict“Choose the ITC-306T for scheduled greenhouse heating and alerts, but look elsewhere if you need cooling control.”
Inkbird ITC-308 Temperature Controller with IHC-200 Humidity Controller
I’d rank this Inkbird two-controller kit for greenhouse owners managing more than temperature alone. The ITC-308 handles heating and cooling, while the IHC-200 can control humidifying and dehumidifying equipment, giving a grow tent or enclosed greenhouse separate tools for two environmental variables. That makes it a broader setup than the heating-focused Inkbird ITC-306T, which offers day/night heat schedules but no cooling or humidity control. Both units support calibration and alarm settings, so growers can tailor alerts to their target conditions. The tradeoff is a more involved installation: the kit uses manual wiring and separate power sources, and its relays provide basic on/off control rather than remote monitoring or fine-grained automation. Buyers wanting a single plug-in thermostat will find this kit more equipment than they need.
Pros:- Temperature unit supports heating and cooling equipment
- Humidity unit supports humidifying and dehumidifying equipment
- Calibration and custom high/low alarms for both environmental controls
- Compact displays provide current readings
Cons:- Requires manual wiring and separate power sources
- No wireless connectivity or remote monitoring
- Relay control is basic on/off rather than advanced automation
Best for: Growers managing an enclosed greenhouse or grow tent who need separate control of temperature and humidity equipment.
Not ideal for: Buyers seeking a single plug-and-play thermostat, wireless monitoring, or advanced automated control.
- Included units:ITC-308 temperature controller and IHC-200 humidity controller
- Number of items:2
- Temperature control:Heating and cooling
- Humidity control:Humidifying and dehumidifying
- Relay type:Dual relays on each controller
- Voltage:120 volts
- Display:LCD or LED
- Material:Plastic
Our verdict“Choose this kit when temperature and humidity both need active management; for heating schedules alone, the Inkbird ITC-306T is simpler.”
DEWENWILS Smart Wi-Fi Temperature Controller with Memory
The DEWENWILS Smart Wi-Fi controller is the most connected choice in this group: app control and schedules can help growers adjust a greenhouse from elsewhere, while memory restores prior settings after a power outage. Its heating, cooling, and timer modes also make it more versatile than the BN-LINK BNQ-T7H, which only controls heating. The backlit LCD remains useful when checking the unit locally, and the stated 15A, 1800W capacity supports a wider load than the BN-LINK’s 1000W rating. There is a data caveat: the temperature range is listed as both -40°F to 210°F and -40°F to 240°F, so I would verify the supported upper limit before relying on it for a specific application. App features also depend on Wi-Fi access.
Pros:- App control and scheduling over Wi-Fi
- Supports heating, cooling, and timer modes
- Restores previous settings after a power outage
- 15A, 1800W capacity and backlit LCD
Cons:- Remote app control requires Wi-Fi
- Product information gives conflicting upper temperature limits of 210°F and 240°F
- Plastic construction may be less suitable for exposed greenhouse locations
Best for: Greenhouse owners who want app-based adjustments, scheduled temperature control, and heating or cooling modes.
Not ideal for: Growers without reliable Wi-Fi, or buyers whose application depends on a confirmed upper temperature limit.
- Connectivity:Wi-Fi
- Control method:App
- Voltage:120 volts
- Maximum wattage:1800 watts
- Maximum current:15A
- Listed temperature range:-40°F to 240°F; description also states an upper limit of 210°F
- Temperature accuracy:0.1°F
- Modes:Cooling + Timer, Heating + Timer, Cooling, Heating, Timer, and OFF
- Warranty:1 year
Our verdict“Pick DEWENWILS for connected scheduling and outage memory, after confirming its temperature range and providing dependable Wi-Fi.”
SENSTREE Waterproof Digital Temperature Controller, 110V, 10A, 1100W
For a greenhouse where splashes and condensation are a concern, the SENSTREE DTC310ZJ-JP has a practical advantage over the DEWENWILS Wi-Fi controller: its body and sensor are listed as IP65 waterproof, and its plug-and-play format avoids the manual wiring required by the Inkbird temperature-and-humidity kit. It supports heating and cooling setups, so it can serve more than a seedling-mat thermostat like the BN-LINK BNQ-T7H. The LCD and Celsius/Fahrenheit display keep local checks simple. A notable drawback is conflicting electrical information: the listing gives both 110V and 220V, while the product title specifies 110V. I’d confirm compatibility before connecting equipment. Its 10A, 1100W rating also leaves less load capacity than the 15A DEWENWILS.
Pros:- IP65 waterproof body and sensor
- Supports heating and cooling setups
- Plug-and-play design with an LCD
- Displays temperatures in Celsius or Fahrenheit
Cons:- Voltage listing gives both 110V and 220V, so compatibility needs confirmation
- 10A, 1100W capacity is below the DEWENWILS controller’s stated 15A, 1800W
- No Wi-Fi or remote app control is listed
Best for: Greenhouse growers who need a plug-and-play temperature controller with a waterproof body and sensor for damp conditions.
Not ideal for: Buyers needing high-wattage equipment control or those unable to confirm whether the listed voltage matches their setup.
- Model:DTC310ZJ-JP
- Voltage:Listed as 110V and 220V
- Current:10A
- Maximum power:1100W
- Display:LCD
- Material:ABS
- Dimensions:5.39 × 2.56 × 1.1 in
Our verdict“Choose SENSTREE for a damp greenhouse and local plug-and-play control, but verify the voltage and load before buying.”
KETOTEK Digital Thermostat Outlet Plug with Temperature Probe
The KETOTEK KT3100 is a flexible choice for greenhouse growers who want a simple outlet controller with more than one operating mode. It can switch a heater or cooling device based on adjustable start and stop temperatures, while the 3-meter probe gives more placement freedom than a short sensor lead. Its cycle and countdown timers also suit setups where equipment needs scheduled operation, although those timer functions cannot run alongside temperature control. Compared with the Luxbird LB-2SC, KETOTEK offers a wider temperature range and supports cooling, but it controls one outlet rather than two independent loads. Memory retention after a power outage is useful for unattended spaces; buyers should still match the connected equipment to its 15A maximum at 120V.
Pros:- Plug-in setup avoids complex wiring
- Supports both heating and cooling modes
- Three-meter probe allows flexible sensor placement
- Memory retains settings after a power outage
Cons:- Temperature control and timer functions cannot be used simultaneously
- Controls one outlet, unlike the Luxbird LB-2SC’s dual independent outlets
- Maximum output is limited to 15A at 120V
Best for: Greenhouse owners who want one plug-in controller for a heater or cooler, a long probe lead, and timer options for separate operating routines
Not ideal for: Growers who need two independently controlled devices or temperature regulation and timer operation at the same time
- Model:KT3100
- Power supply:100–250V AC
- Maximum output:15A at 120V
- Temperature range:-40°C to 120°C (-40°F to 248°F)
- Control accuracy:±1°C / ±2°F
- Temperature probe:3-meter NTC 10K sensor
- Operating modes:Heating, cooling, cycle timer, and countdown timer
- Timer range:0–99 hours 59 minutes
Our verdict“Choose the KETOTEK KT3100 if you want a versatile single-outlet controller with a long probe and outage memory, but skip it if you need dual-zone control.”
DIGITEN DTC310 Waterproof Temperature Controller, 10A Digital Thermostat
The DIGITEN DTC-310 earns its place for greenhouse owners who need a controller built around exposure to moisture. Its IP65 housing and waterproof probe make it a more fitting option for damp areas than the KETOTEK KT3100, whose listing does not specify a water-resistance rating. High- and low-temperature alarms add a warning layer when conditions move outside the chosen limits, and the illuminated LED display is easier to check in dim corners. The tradeoff is that DIGITEN’s instructions recommend hanging the unit for better waterproofing, so it should not be treated as a device to leave sitting in water or on a wet floor. Compared with the Wi-Fi Inkbird ITC-308, this model favors weather-conscious placement over remote app monitoring.
Pros:- IP65-rated housing and waterproof sensor probe
- High- and low-temperature alarms flag out-of-range conditions
- Illuminated LED display is practical in low light
- Wide stated temperature range from -40°F to 248°F
Cons:- Recommended to hang the unit for better waterproofing
- No Wi-Fi or remote monitoring features are listed
- The provided product data does not specify output capacity or operating modes
Best for: Greenhouse growers placing a controller in a humid area who want a waterproof probe, a moisture-resistant housing, and local temperature alarms
Not ideal for: Buyers who need remote app access, documented heating-and-cooling relay details, or a controller suitable for submersion
- Model:DTC-310
- Temperature range:-40°F to 248°F (-40°C to 120°C)
- Water resistance:IP65
- Display:Illuminated LED
- Sensor:Waterproof probe
- Alarms:High- and low-temperature
- Housing material:Plastic
- Warranty:12 months
Our verdict“Pick the DIGITEN DTC-310 for a damp greenhouse location where local alarms and water resistance matter more than app control.”
Luxbird Digital Temperature Controller LB-2SC – Thermostat Outlet for Reptile Terrarium, Greenhouse & Grow Tent (Green)
The Luxbird LB-2SC is the lineup’s clearest fit for growers who want separate control of two modest heating loads. Its dual independent outlets let each connected device follow its own temperature range, which is more useful for two seedling areas than the single-outlet KETOTEK KT3100. Two probes and a readable LCD make it easier to monitor both spots without adding a second controller, while high- and low-temperature alarms can alert you to excursions. The limitation is output: each outlet is capped at 250 watts, and the operating range tops out at 113°F, so this is aimed at small mats or similar loads rather than larger greenhouse heaters. Unlike the Wi-Fi Inkbird ITC-308, Luxbird has no remote app control.
Pros:- Two independent outlets support separate temperature ranges
- Includes two probes for monitoring separate locations
- LCD shows current and target temperatures plus heating status
- High- and low-temperature alarms warn of out-of-range conditions
Cons:- Each outlet is limited to 250 watts
- Temperature range ends at 113°F
- No wireless or remote app control
Best for: Growers running two small seedling or propagation zones with separate heat mats and wanting independent temperature settings at each outlet
Not ideal for: Greenhouse owners using higher-wattage heaters, needing cooling control, or wanting to monitor temperatures remotely
- Model:LB-2SC
- Input voltage:120V
- Operating temperature range:32°F to 113°F (0°C to 45°C)
- Outlets:Two independent outlets
- Maximum output per outlet:250 watts
- Display:LCD
- Sensors:Two temperature probes
- Material:ABS
Our verdict“Choose the Luxbird LB-2SC for two small, separately heated greenhouse zones, but choose a higher-capacity controller for full-size heaters.”
Inkbird ITC-308 WiFi Temperature Controller
The Inkbird ITC-308 WiFi is the strongest pick here for growers who cannot check the greenhouse in person throughout the day. Its app supports remote temperature monitoring, while separate relay outputs can operate heating and cooling devices to respond to changing conditions. That makes it more adaptable than the DIGITEN DTC-310, which emphasizes a waterproof housing and local alarms but does not list Wi-Fi. The Inkbird also offers high- and low-temperature alarms, Fahrenheit or Celsius readings, and calibration. Its main constraint is network dependence: it requires a 2.4 GHz Wi-Fi router, and the specified 1100W maximum at 110V sets a firm ceiling for connected equipment. Buyers should also check iOS compatibility if they plan to use the app. It is a better fit for connected oversight than for wet placement.
Pros:- App enables remote temperature monitoring
- Dual relay outputs support heating and cooling equipment
- High- and low-temperature alarms provide local warnings
- Temperature calibration and Fahrenheit/Celsius settings are available
Cons:- Requires a 2.4 GHz Wi-Fi router
- Maximum output is 1100W at 110V
- iOS app compatibility requires iOS 13 or later
Best for: Greenhouse owners who want app-based temperature monitoring and the ability to control separate heating and cooling equipment
Not ideal for: Growers without reliable 2.4 GHz Wi-Fi, those needing a waterproof controller housing, or users whose connected load exceeds 1100W at 110V
- Model:ITC-308-WIFI-LW
- Connectivity:2.4 GHz Wi-Fi
- Voltage:110V
- Maximum output load:1100W
- Relay outputs:Dual
- Display:LCD
- Control:App and push buttons
- Temperature modes:Heating and cooling
Our verdict“Choose the Inkbird ITC-308 WiFi if remote monitoring and paired heating-and-cooling control outweigh its Wi-Fi and load limits.”
Inkbird WiFi ITC-308 Digital Temperature Controller
This Inkbird ITC-308-US offers a straightforward app-connected way to manage greenhouse heating and refrigeration equipment, with dual relay outputs and high- and low-temperature alarms. Its stated capacity of 1100W at 110V is the same practical ceiling as the ITC-308 WiFi model in this roundup, so neither is the right choice for a load that exceeds that limit. Compared with the KETOTEK KT3100, this Inkbird adds remote control through an iOS or Android app but gives up KETOTEK’s cycle and countdown timer options. The 2.4 GHz network requirement also rules it out for growers whose greenhouse has no compatible Wi-Fi coverage. For buyers choosing between the two Inkbird listings, the supplied details are very similar; this version specifically lists a control panel, socket, probe, and power cord.
Pros:- Remote control through the INKBIRD app on iOS or Android
- Dual relays support heating and cooling equipment
- High- and low-temperature alarms provide alerts
- Supports Fahrenheit or Celsius readings and calibration
Cons:- Wi-Fi connection supports 2.4 GHz only
- Maximum output is 1100W at 110V
- App control depends on compatible network access
Best for: Greenhouse growers who want to control heating and refrigeration equipment from an iOS or Android app and have compatible 2.4 GHz Wi-Fi
Not ideal for: Buyers without 2.4 GHz Wi-Fi, those needing more than 1100W at 110V, or growers who prefer a non-connected controller
- Model:ITC-308-US
- Connectivity:2.4 GHz Wi-Fi
- Voltage:110V
- Maximum output load:1100W at 110V
- Temperature control:Heating and cooling
- Control:App and push buttons
- Display:Digital
- Included components:Control panel, socket, probe, and power cord
Our verdict“Choose this Inkbird ITC-308 if you want app-managed heating and cooling within its 1100W limit and have 2.4 GHz Wi-Fi in the greenhouse.”
How We Picked
I ranked these controllers by how well their stated functions map to greenhouse temperature control: support for heating and cooling, usable temperature range, load limits, probe design, and how clearly the controls fit a real setup. I also weighed day-to-day usability, including outlet format, display and programming, memory, Wi-Fi access, and whether humidity control is included. Moisture exposure and electrical ratings matter in a greenhouse, so waterproof claims and stated capacity are treated as practical selection factors rather than minor extras.
The order favors versatile controllers that can handle common greenhouse heating-and-cooling tasks without forcing buyers into a more involved system. Models with added Wi-Fi or humidity control earn a place for specific needs, but those features do not automatically outrank simpler options. Single-purpose cooling or reptile-oriented thermostats rank lower for general greenhouse use, though they may suit a narrowly defined setup. The product names include several closely related Inkbird models; I distinguish them by the functions stated for each listing and avoid assuming that similarly named versions have identical features.
Factors to Consider When Choosing Best Greenhouse Temperature Controllers
Choosing a controller starts with the equipment you need it to switch, not with the most feature-rich listing. I would match the controller’s operating mode, electrical rating, probe placement, and control style to the greenhouse before deciding whether Wi-Fi or humidity management adds enough value.
Match the control mode to your climate plan
A heating-only thermostat can work well if your greenhouse has reliable passive ventilation and only needs protection from cold. If you want one controller to switch a heater and a fan or cooling device, look for explicit heating-and-cooling support and confirm how its outlets behave. Avoid assuming that two sockets mean two independently programmed zones; many controllers use them as paired heating and cooling outputs around one temperature target. A mismatch can leave equipment cycling in ways you did not intend. Think through the hottest and coldest conditions your greenhouse faces before choosing a single-purpose model. For a setup with separate climate zones, you may need more than one controller rather than a more complicated single outlet.
Check electrical load and equipment compatibility
Compare the controller’s voltage, current, and wattage limits with the label on every device it will switch. The controller’s stated capacity is a ceiling, not a recommendation to run a heater at its maximum continuously. Motors, fans, and other equipment can have different electrical behavior from simple resistive heaters, so check the device maker’s guidance if the load type is unclear. Do not use an outlet rating as proof that a multi-device power strip is safe; the combined load still matters. A controller can regulate temperature correctly and still be a poor match for equipment that exceeds its electrical limits. If your heater needs more capacity than the controller provides, use a properly rated switching arrangement rather than improvising an adapter.
Plan probe placement before mounting the controller
The probe measures the conditions where it sits, not the average temperature of the whole greenhouse. Place it near the plants or area you care about, away from heater outlets, direct sun, cold glazing, and stagnant corners. In a long greenhouse, one probe may miss meaningful differences from end to end, so separate zones can call for separate sensors and controls. Keep the probe cable routed where it will not be pinched, cut, or pulled during watering and maintenance. A waterproof controller or probe can help with damp conditions, but it does not make every connector or outlet safe from splashes. Check exactly which parts carry the water-resistance claim.
Decide whether remote access is worth the extra complexity
Wi-Fi can help you check temperatures or receive alerts when you are away, but it depends on a stable network and a clear app setup. It does not replace local control or a backup plan if the router, internet connection, or power fails. For a greenhouse beside the house, a readable display and simple buttons may be easier than app-based management. Remote features make more sense for distant sites, frequent travel, or crops that need close attention to temperature swings. Before buying, confirm which functions remain available without a network connection. If remote access is your main reason for paying more, also decide how you will respond to an alert.
Treat humidity as a separate control decision
Temperature and humidity affect plant conditions together, but a temperature controller does not automatically manage moisture. If humidity control matters, check whether the listing includes a dedicated humidity controller or only a temperature function. Separate controls can operate a humidifier or dehumidifier, though they add another probe, outlet, and set of settings to maintain. Avoid relying on temperature readings as a stand-in for humidity: they answer different questions about the greenhouse environment. Growers with humidity-sensitive crops may benefit from a coordinated setup, while a small greenhouse focused on frost protection may not need that added layer. Choose equipment that can switch the actual humidifying or drying device you plan to use.
Choose the simplest setup that covers your risks
More modes and settings can make a controller more flexible, but they also create more chances for incorrect configuration. A beginner may be better served by a plug-in thermostat with a clear display and a straightforward setpoint than by an app-driven setup with features they will not use. At the same time, a basic controller may not provide alerts or humidity management that a remote greenhouse needs. Consider what happens during a sensor fault, power interruption, or unexpectedly cold night, and check the product documentation for alarms and memory behavior. A controller is only one part of climate protection; backup heat, ventilation, and safe wiring still matter. Spend extra for a feature tied to a real failure point in your setup, not simply because it appears on the specification list.
Frequently Asked Questions
Can one temperature controller run both a greenhouse heater and a fan?
It can if the controller explicitly supports heating and cooling and its outlets are intended for those loads. Check whether the two outputs switch independently around heating and cooling setpoints or follow another control scheme. Confirm the electrical ratings against both devices, including the fan’s requirements. A cooling-only or heating-only thermostat will not offer the same paired control. For separate greenhouse zones, one controller and probe may not provide enough information or control.
Is a Wi-Fi temperature controller worth choosing over a basic plug-in model?
Wi-Fi is most useful when you need to check conditions remotely or receive alerts while away from the greenhouse. It may add little value if you can inspect the display regularly and the greenhouse is close to home. App features depend on network access, so consider how the controller behaves when Wi-Fi is unavailable. Remote monitoring also cannot fix an undersized heater, poor probe placement, or an unsafe electrical setup. Choose Wi-Fi for a specific monitoring need, not as a replacement for sound climate planning.
Do I need a waterproof temperature controller for a greenhouse?
Greenhouses often expose equipment to humidity, condensation, and splashes, so moisture protection can be a useful advantage. Check whether the waterproof claim applies to the controller, the probe, connectors, or only selected parts. Even a water-resistant device should be mounted away from direct spray and standing water. Protect plugs and cable connections according to the product instructions and applicable electrical guidance. If your controller will sit in a dry, protected enclosure, a waterproof model may matter less than probe placement and control compatibility.
Should I buy a temperature controller with humidity control?
Choose one if you plan to operate a humidifier or dehumidifier based on measured humidity, rather than temperature alone. The Inkbird ITC-308 paired with the IHC-200 is the standout option in this roundup for combining those control needs. A separate humidity function adds setup and another device to maintain, so it may be unnecessary for a greenhouse focused mainly on frost protection. Check that the humidity controller can switch the equipment you own and that its sensor suits the environment. Temperature and humidity readings should be treated as distinct measurements.
How do I know whether a controller can handle my greenhouse heater?
Read the heater’s electrical label and compare its voltage, current, and wattage with the controller’s stated limits. Leave room below the controller’s maximum rather than treating that number as a target for continuous use. If the controller will also operate a fan or another device, account for the full load and confirm how its outlets are designed to work. When the load type or rating is unclear, check the manufacturer’s instructions or consult a qualified electrician. Do not use an adapter or power strip to bypass a controller’s limits.
Conclusion
For most growers who want one device to handle routine heating and cooling, I would start with the Inkbird ITC-308 as the best overall choice. The WILLHI WH2408 is a value-oriented option for buyers whose needs fit its stated 10A, 1200W capacity, while the DEWENWILS Smart Wi-Fi Controller is the best premium-style pick for remote access. Beginners may prefer the straightforward plug-in format of the Diymore or KETOTEK, after confirming the ratings and modes fit their equipment. For damp conditions, compare the SENSTREE and DIGITEN waterproof-positioned models; for temperature plus humidity control, choose the Inkbird ITC-308 with IHC-200. My final choice would depend on the heater and cooling load first, then on whether waterproofing, humidity management, or Wi-Fi solves a specific need.
