9 Best Wireless Soil Moisture Sensors (November 2026)

The best wireless soil moisture sensors include the ECOWITT WH0291 Soil Moisture Tester Plant Soil for standalone plant checks, the RAINPOINT Smart Digital Wireless Plant Moisture Meter for hub owners, and the ECOWITT WH51L Soil Moisture Sensor with 1m/3.28ft for deeper beds.

On this page (7 sections)

1. How we chose the best wireless soil moisture sensors
2. Which best wireless soil moisture sensor fits your garden?
3. What should you compare when choosing a wireless soil moisture sensor?
4. How do you set up and care for a wireless soil moisture sensor?
5. What mistakes make wireless soil readings harder to use?
6. How should you use readings to guide watering?
7. Which best wireless soil moisture sensor should you choose?

Best Wireless Soil Moisture Sensors

The ECOWITT WH0291 is the best wireless soil moisture sensor for simple local checks, with moisture readings on its own LCD. RAINPOINT suits app checks with a compatible hub, while Ecowitt gateway kits suit gardeners who want online records and alerts.

A wireless soil monitor can mean a standalone display, a sensor linked to a receiver, or a smart soil moisture sensor that sends data through a hub. Decide where you want to see readings before comparing probes, apps and channel capacity.

Our picks at a glance

1. 1
   Best for standalone plant checks

   ECOWITT WH0291 Soil Moisture Tester Plant Soil

   9.4/10 our score

   See it on Amazon
2. 2
   Best for hub owners

   RAINPOINT Smart Digital Wireless Plant Moisture Meter

   9.3/10 our score

   See it on Amazon
3. 3
   Best for deeper beds

   ECOWITT WH51L Soil Moisture Sensor with 1m/3.28ft

   9.2/10 our score

   See it on Amazon

4. 4

   Ecowitt GW1106 Soil Moisture Meter Kit

   Best for online garden records
   Check it
5. 5

   Ambient Weather WH31SM Soil Moisture Sensor

   Best for Ambient station owners
   Check it
6. 6

   NexusLab Wireless Soil Moisture Meter with LCD

   Best for many garden zones
   Check it
7. 7

   ECOWITT GW1206 Soil Moisture Tester Kit

   Best for new Ecowitt setups
   Check it
8. 8

   NexusLab Wireless Soil Moisture Meter with LCD

   Best for two plant locations
   Check it
9. 9

   Spider Farmer GGS 3 in 1 Soil

   Best for GGS grow rooms
   Check it

How we chose the best wireless soil moisture sensors

The best wireless soil moisture sensors match the way you plan to read and use measurements. We compared display type, connectivity, calibration options, included parts and whether a separate hub is required.

A local screen is simplest when you want to walk past a plant and read it. A gateway system can show readings remotely or keep records, but it adds setup and compatibility checks.

Review Zigbee soil moisture sensors for a gateway-based option.

For a plain explanation of what these devices measure, see what a soil moisture sensor is and what to expect. If you need moisture readings alongside ground temperature, compare soil moisture and temperature sensors for that combination.

Which best wireless soil moisture sensor fits your garden?

The ECOWITT WH0291 is the best choice for an onboard LCD, while RAINPOINT offers optional app monitoring and the other picks suit deeper probes, multiple zones or gateway platforms.

1

ECOWITT WH0291 Soil Moisture Tester Plant Soil: Best for standalone plant checks

9.4/10Our score

• LCD moisture display
• Custom low and high calibration
• Indoor and outdoor use
• 12 or 24 hour time display

The WH0291 displays moisture locally, so you don't need a gateway or phone app for a reading. Custom low and high values help adapt it to different soil types.

See it on Amazon

Pros

• LCD readout on the unit
• Custom calibration
• Indoor and outdoor use

Cons

• No remote app monitoring
• Batteries not included

The ECOWITT WH0291 is the most direct choice if you want a reading at the plant rather than a phone notification. Its LCD uses a flower pot icon to make the moisture level easy to scan, and the sensor is designed for indoor and outdoor potted plants, lawns and gardens.

It measures moisture within 72 seconds and includes custom low and high values. Those settings can help you adapt the readout to a particular soil type instead of treating one moisture number as right for every pot.

The WH0291 also displays time in 12 or 24 hour format. It needs two AA batteries, one for the display console and one for the sensor, and those batteries are not included.

Choose it for straightforward local monitoring. Skip it if you want phone alerts or a history of readings, since those connected features are not part of this setup.

2

RAINPOINT Smart Digital Wireless Plant Moisture Meter: Best for hub owners

9.3/10Our score

• Two meters
• LCD readout
• Automatic reading every 3 minutes
• Remote app access requires compatible Wi-Fi hub

The two-pack pairs local LCD checks with optional remote monitoring through the RAINPOINT Home app. A compatible Wi-Fi hub is required for app access and is sold separately.

See it on Amazon

Pros

• Two meters in the set
• Automatic and manual readings
• LCD shows moisture locally

Cons

• App access needs a separately sold compatible hub
• Hub compatibility is limited to named models

RAINPOINT is the smart soil moisture sensor choice here for gardeners who want local readings and optional phone access. The two meters check automatically every 3 minutes, and a short button press starts a manual reading.

The LCD keeps readings visible at the plant, while remote monitoring through the RAINPOINT Home app requires a compatible 2.4 GHz Wi-Fi hub. Supported hub models are HWG023, HWG023WBRF and HWG040, sold separately.

RAINPOINT uses capacitive probes and describes the set as suitable for indoor and outdoor use. Two meters, pH test strips and a Phillips screwdriver are included.

Choose this set if you have several plants and want app access through a compatible hub. Skip it if you want remote monitoring without one of the supported hubs.

3

ECOWITT WH51L Soil Moisture Sensor with 1m/3.28ft: Best for deeper beds

9.2/10Our score

• 1 m wired probe
• LCD real-time display
• Gateway or console pairing
• Custom calibration

Its 1 m wired probe is intended for deeper soil checks, and the sensor has its own LCD. For app access, pair it with a compatible Ecowitt gateway and complete Wi-Fi setup.

See it on Amazon

Pros

• Long wired probe
• LCD displays real-time data
• Supports custom calibration

Cons

• Gateway or console sold separately for connected monitoring
• Body placement can affect RF transmission

The ECOWITT WH51L suits deeper soil checks, with a 1 m / 3.28 ft wired probe and an LCD on the sensor. The probe can measure soil moisture to nearly 80 cm, while the main sensor body should sit at least 20 cm above the soil surface for better RF transmission.

You can read moisture locally on its screen. To view data in the Ecowitt app or send it online, pair the WH51L with a compatible gateway and complete Wi-Fi setup; the gateway is sold separately.

ECOWITT supports up to eight channels with compatible gateways or consoles. The sensor also allows custom calibration for different soil moisture levels.

Choose the WH51L when deeper placement matters and you're comfortable checking gateway compatibility. Skip it for a simple shallow pot check if the long probe and separate connectivity setup would go unused.

4

Ecowitt GW1106 Soil Moisture Meter Kit: Best for online garden records

8.9/10Our score

• GW1100 Wi-Fi gateway and WH51 sensor
• Online history and downloadable records
• Email alerts supported
• Supports up to 8 WH51 sensors

This kit includes a gateway for viewing sensor data online, keeping records and setting email alerts. The WH51 sensor does not display a reading by itself.

See it on Amazon

Pros

• Gateway and sensor included
• Online graph and history records
• Supports multiple WH51 channels

Cons

• WH51 needs a gateway or console to show readings
• Rocky or hard soil is not suitable

The Ecowitt GW1106 kit combines a gateway and WH51 sensor for gardeners who want web or app access to moisture readings. The gateway can send data to the Ecowitt weather server, where you can view graphs, download history and set email alerts.

The WH51 sensor does not show readings on its own, so the gateway or a compatible console is needed to view measurements. The kit supports up to eight WH51 channels, letting you add sensors for separate beds or pots within the Ecowitt system.

ECOWITT describes the WH51 as suitable for indoor and outdoor use. It measures soil moisture only, and ECOWITT cautions against use in stone or hard rocky soil.

Choose this kit if online monitoring and records matter more than a standalone screen. Skip it if you don't want Wi-Fi setup or prefer to read a sensor directly at the plant.

5

Ambient Weather WH31SM Soil Moisture Sensor: Best for Ambient station owners

8.7/10Our score

• Pairs with WS-2000 and WS-5000 consoles
• Supports up to 8 channels
• 71-second refresh rate
• Wireless range up to 300 ft line of sight

The WH31SM fits an existing Ambient Weather setup, with readings sent to a compatible console or cloud service. Its range is stated as up to 300 ft line of sight and 100 ft in most conditions.

See it on Amazon

Pros

• Supports up to 8 sensor channels
• Compatible console and cloud access
• Ceramic cap

Cons

• Needs a compatible Ambient Weather system for remote viewing
• Calibration is needed before installation

The Ambient Weather WH31SM is suited to an existing Ambient Weather station. It supports up to eight channels with WS-2000 or WS-5000 consoles and refreshes readings every 71 seconds.

Its wireless range is up to 300 ft in line of sight, or 100 ft in most conditions. The sensor uses one AA battery, not included, and should be calibrated before installation at no more than 4 in deep.

The ceramic cap is intended to make the sensor less sensitive to differences in soil density. Readings can go to a compatible console or AmbientWeather.net, depending on your setup.

Choose the WH31SM for an existing Ambient Weather system. Skip it if you don't own a compatible console or connected system.

6

NexusLab Wireless Soil Moisture Meter with LCD: Best for many garden zones

8.7/10Our score

• Wireless LCD receiver
• Measures moisture, temperature and light
• Starts with 2 sensors and expands to 12 zones
• No Wi-Fi or app required

A central LCD receiver can show readings from multiple garden zones without app or Wi-Fi setup. Each sensor also reports soil temperature and light alongside moisture.

See it on Amazon

Pros

• Local receiver avoids app setup
• Tracks multiple zones
• Shows moisture, temperature and light

Cons

• Wireless range can drop around walls and obstacles
• Not suited to loose media such as pure perlite or gravel

The NexusLab three-probe set is built for checking several zones from one indoor receiver. It starts with two sensors and can expand to 12 zones, with each sensor measuring moisture, soil temperature and light.

The receiver works over a direct RF connection, so no app or Wi-Fi is required. Its stated range is up to 230 ft in an open area; walls and other obstacles can reduce that distance.

The screen indicates high, normal or low moisture by zone, and the system can flash an alert when moisture falls below a threshold. NexusLab says the probes are for soil, not liquids or loose media such as pure perlite, coco coir or gravel.

Choose this set for multiple beds or plant groups and one local screen. Skip it if you have just one plant to check or grow in loose media that the probes aren't designed for.

7

ECOWITT GW1206 Soil Moisture Tester Kit: Best for new Ecowitt setups

8.7/10Our score

• GW1200 gateway and WH51 sensor
• USB-powered gateway
• App or website Wi-Fi setup
• WH51 readings can be viewed through Ecowitt app

The kit combines a GW1200 gateway with a WH51 sensor for connected moisture monitoring. The gateway also has temperature, humidity and barometric pressure sensors.

See it on Amazon

Pros

• Gateway and sensor included
• Wi-Fi setup through app or website
• USB extension cable included

Cons

• WH51 is not a standalone display sensor
• Gateway needs USB power and Wi-Fi setup

The ECOWITT GW1206 is a gateway kit with a GW1200 and a WH51 sensor for connected monitoring. The gateway can be configured through the Ecowitt app or website and runs on USB power.

Like the GW1106, the WH51 measures moisture but cannot display a reading by itself. The gateway provides the path to app or online viewing, and the kit includes a USB extension cable.

The GW1200 also has temperature, humidity and barometric pressure sensors. The WH51 measures soil moisture only, so it won't replace a separate soil thermometer or a broader garden sensor.

Choose this set if you want an Ecowitt gateway included and plan to use the system's app or web tools. Skip it if you need a screen built into the soil sensor or don't want to configure Wi-Fi.

8

NexusLab Wireless Soil Moisture Meter with LCD: Best for two plant locations

8.2/10Our score

• Receiver and 2 sensors
• Moisture and temperature readings
• Flashing low-moisture alert
• No app required

This set uses a receiver to check two plant locations and flashes an icon when moisture falls below the chosen limit. It works without Wi-Fi, Bluetooth or an app.

See it on Amazon

Pros

• Two sensors included
• Local display and low-moisture alert
• No app setup

Cons

• Transmission intervals mean readings may take time to change after watering
• Range depends on obstacles

This NexusLab set offers a local receiver with two sensors for checking two plant areas without an app. A moisture reading below the chosen limit triggers a flashing flower pot icon on the screen.

The sensors also measure temperature, and the system is described as suitable for indoor and outdoor plants. It uses AA and AAA batteries, which are included, and its range is up to 230 ft in an open area.

Wireless readings arrive at intervals, so the receiver may not reflect a watering change immediately. Allow time for water to reach the monitored soil and wait for the next transmission before making another watering decision.

Choose this set for two plant locations and a low-moisture reminder. Skip it if you need extensive zone coverage or light readings; the larger NexusLab set covers more zones and includes light measurement.

9

Spider Farmer GGS 3 in 1 Soil: Best for GGS grow rooms

7.9/10Our score

• Measures moisture, temperature and EC
• Connects by RJ12 cable
• App charts through a GGS controller or power strip
• Supports up to 6 sensors in the system

This sensor is designed to connect to a Spider Farmer GGS controller or power strip for app readings and historical charts. It suits a grow setup already using that system.

See it on Amazon

Pros

• Three soil measurements
• App charts and historical trends through GGS
• Supports multiple sensors in the system

Cons

• Requires a compatible GGS system
• Not a standalone wireless receiver

The Spider Farmer GGS sensor suits growers already using a compatible GGS controller or power strip. It connects by RJ12 cable and can send moisture, temperature and EC readings to the Spider Farmer app for charts and historical trends.

This is not a standalone wireless receiver. A GGS system is required for app monitoring, and the system supports up to six sensors.

Spider Farmer describes the probes as sealed stainless steel and supports selecting among yellow clay, peat soil and coconut coir substrate types. The sensor can also work with a GGS power strip and drip irrigation setup for programmed watering cycles.

Choose it when you already use the GGS system and want several soil measurements in that workflow. Skip it if you want a wireless receiver for general garden beds or don't have a compatible controller or power strip.

What should you compare when choosing a wireless soil moisture sensor?

Compare where readings appear, whether a hub is needed and how the probe fits the soil you want to measure. A sensor that needs a separate gateway adds setup and compatibility checks.

Does the wireless soil moisture sensor need a gateway?

Some wireless sensors send readings directly to a local screen, while other models use a gateway for app or online access. The WH0291 and NexusLab receiver sets show data locally, while RAINPOINT needs a compatible Wi-Fi hub for remote app monitoring.

Ecowitt gateway kits include a gateway, but the WH51L sensor alone needs a compatible Ecowitt gateway or console to share readings remotely. Check model compatibility before adding sensors to a system you already own.

Is the probe suited to your soil and placement?

Probe shape and installation depth affect which part of the root area the reading represents. The WH51L has a long wired probe for deeper placement, while the Ambient Weather WH31SM should be installed no more than 4 in deep after calibration.

Hard, rocky or loose media can also limit use. Follow each sensor's soil guidance and avoid forcing a probe into compacted ground.

Does a wireless soil moisture sensor need more than a moisture reading?

A moisture-only sensor keeps attention on watering, while a combined sensor may also report temperature, light or EC. NexusLab tracks moisture, soil temperature and light; Spider Farmer GGS adds EC but needs its controller or power strip.

For pots and beds where only moisture matters, extra readings may add clutter. Match the measurements to the decisions you plan to make.

How many plants or zones should your wireless soil moisture sensor cover?

A multi-zone receiver can reduce repeated manual checks across a garden. The NexusLab three-probe model can expand to 12 zones, while Ecowitt systems support up to eight WH51 or WH51L channels.

For one houseplant or a small patio, a single-display sensor may be easier to manage. For larger gardens, name the zones clearly so readings remain useful.

How do you set up and care for a wireless soil moisture sensor?

Set up the sensor where it can measure soil around the roots, then keep its position consistent so you can compare readings over time. Check the instructions for probe depth, calibration and pairing before placing it in the ground.

Start by identifying the part of the soil you want to monitor. A shallow sensor near the surface may not reflect moisture deeper in a larger pot or bed, so choose a probe that fits the root area you want to check.

Calibrate sensors that support calibration before relying on a moisture threshold. The WH0291 offers custom low and high values, and Ambient Weather supports two-point soil type calibration through compatible software.

For a wireless model, pair the receiver or gateway before placing the sensor. Keep the WH51L body at least 20 cm above the soil surface to support RF transmission, and follow each model's compatibility requirements.

After watering, give moisture time to spread through the soil and allow the next reading to arrive. One immediate reading can reflect a wet patch near the probe rather than moisture around the full root area.

Keep the sensor in the same spot when comparing trends. If you move it, changes in soil, depth or packing can make trends harder to interpret.

Don't force a probe through stones or hard ground. Choose a clearer position or a sensor suited to the soil, and avoid using sensors in liquids or loose media when the model guidance rules those out.

What mistakes make wireless soil readings harder to use?

The most common mistake is treating one number as a watering command without considering sensor placement, soil type or how recently you watered. A reading is more useful as a consistent reference than as a universal threshold.

A sensor placed near the soil surface may not represent moisture at the roots. Place it at a repeatable depth that suits the plant and probe, then compare readings at that same point.

Another mistake is choosing a sensor that cannot connect to the screen or app you plan to use. Confirm whether you need a receiver, gateway, console or controller, and check the named compatible models.

Don't assume every wireless system sends constant updates. A reading may stay the same until the sensor transmits again, and newly added water may need time to spread through the soil.

Don't force a probe into rocky or unsuitable media. Poor placement can make the reading less useful and may damage the probe.

How should you use readings to guide watering?

Use the sensor to notice whether a particular area is drying, then check the plant and soil before watering. A consistent trend can help you learn how quickly a pot or bed dries under your conditions.

Set custom thresholds only after observing readings in that location. Calibration features can help align a sensor with different soil types, but placement and consistent use still matter.

For a separate temperature reading, see soil thermometers for gardening. If you're monitoring a large field or crop area, review soil moisture sensors for agriculture for options aimed at that scale.

Which best wireless soil moisture sensor should you choose?

Choose the ECOWITT WH0291, the highest-scoring pick, if you want an LCD at the plant with custom calibration and no gateway requirement. Pick RAINPOINT if you want two meters and optional app monitoring with a compatible hub.

For remote histories and alerts, choose an Ecowitt gateway kit and confirm that its console or app fits your setup. For multiple local zones, choose NexusLab; for a Spider Farmer GGS setup, choose the GGS sensor.

Start with where you want to see readings, then match the probe and connectivity to your garden. If probe type is your main comparison point, explore capacitive soil moisture sensors.

Our top 3 picks at a glance

1. 1
   Best for standalone plant checks

   ECOWITT WH0291 Soil Moisture Tester Plant Soil

   9.4/10 our score

   See it on Amazon
2. 2
   Best for hub owners

   RAINPOINT Smart Digital Wireless Plant Moisture Meter

   9.3/10 our score

   See it on Amazon
3. 3
   Best for deeper beds

   ECOWITT WH51L Soil Moisture Sensor with 1m/3.28ft

   9.2/10 our score

   See it on Amazon

Frequently asked questions

What is the best wireless soil moisture sensor for houseplants?

The ECOWITT WH0291 is a useful choice if you want to check a plant at the pot without opening an app. For remote checks, RAINPOINT pairs its meters with a compatible Wi-Fi hub, which is sold separately.

Choose based on where you want to see the reading and whether you already own a compatible system.

Do wireless soil sensors need Wi-Fi?

No. Some wireless sensors send readings to a local receiver without Wi-Fi, while gateway models use Wi-Fi for app or online access.

The NexusLab receiver sets work without an app or Wi-Fi.

RAINPOINT app monitoring and Ecowitt online viewing require their compatible hubs or gateways.

Can one wireless sensor work in different soil types?

Readings can vary with soil type, so calibration matters when a sensor supports it. The ECOWITT WH0291 lets you set custom low and high moisture values, while Ambient Weather supports two-point soil type calibration through compatible software.

Use the sensor instructions to calibrate before relying on a threshold for watering.

How deep should a wireless soil moisture sensor go?

Install the probe in the part of the root zone you want to monitor and follow its instructions. The ECOWITT WH51L has a 1 m wire probe for deeper measurements, while Ambient Weather says to calibrate its WH31SM before installation at no more than 4 in deep.

Probe design and soil conditions differ, so don't force a sensor into hard or rocky ground.

Are smart soil moisture sensors accurate enough for watering?

A sensor can help you track changes, but a reading is only useful when the probe suits your soil and is placed consistently. Moisture distribution can differ between the surface and root area.

Check the reading alongside the plant and soil, then use repeated observations to set a watering routine that fits your conditions.