smart plant sensor
smart plant sensors with app
smart plant sensor for light
smart plant sensor



Regular price $39.95
Regular price $2.00 Sale price $39.95
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Keep growing with extra sensors

Our beautifully crafted Sensor continuously monitors your plant’s soil moisture and ambient light, temperature & humidity. The Sensor sends data to the Hub, which notifies you in the app when action is needed to keep your plant happy.
Please note: the Hub and Sensor are besties. One won’t work without the other.

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Sensor Details

  • High quality, corrosion-resistant design
  • Dust, dirt and water-resistant
  • Pair up to 40 Sensors to 1 Hub
  • Communicates with your Hub via Bluetooth
  • Includes long-lasting coin cell battery
  • Features adjustable probe length suitable for pot depths up to 20cm (8”) deep


Is the Sensor for you?

A Hub is required to pair with the Sensor in order to collect plant data. If you currently have a Willow set up with a Hub and need a new Sensor to keep tabs on an additional plant – this is for you!

No Sensor, no Hub? No problem. Our Plant Packs have everything you need to get started.

Say goodbye to guessing over plant care

Who has time to stress over yellowing leaves or another plant funeral (in this economy)? Know exactly what your plant needs anytime, anywhere. Your plants will love having a voice and you’ll love having a thriving indoor jungle that’ll make your mates green with envy.

Never over or under water

Monitors your soil moisture and notifies you when to quench your plant’s thirst

Ensure good growth energy

Tracks your plant’s light intensity and tells you if there’s too much or too little vitamin D to support plant growth

Find the perfect conditions

Helps you find the mix of temperature & humidity that’s just right, so your plant stays comfy

Got mine recently, love the messages from my plants, very funny. There is hope for them yet thanks to this great product! Plants are quite the cost investment so this is definitely a money saver for me

Nadene S.

I’m absolutely loving the Sensors and Hub so far, and the packaging and set up process blew away my expectations!

Matthew F.


Fantastic product that was easy to set up

Stephen P.

Love it. My plants have never looked better and are loving the attention they now get on a regular basis

Mehat R.

Willow App on Phone

It's all on the app

Easily connect your Sensors and Hub to the app and unlock your inner green thumb. Stacked with features and smarts, the Plant with Willow app is your one-stop shop for houseplant care.

Have your plant ID’d

Scans and identifies your plant in one click

Get in your plant’s feelings

Boosts your person-to-plant bond with a rolling plant happiness score

Level up your plant care

Solves your second-guessing with care guides, tutorials, an extensive plant database, and tracks key milestones – watering, repotting, new growth and plant-y more!

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How Willow Works

The setup process is simple:

  1. Pair your Sensor and Hub with the Willow app for iOS and Android
  2. Pick a plant that needs a little love and insert the Sensor into the soil
  3. In the app, select your plant type or use our smart scanner to auto-identify your plant
  4. Name your plant and you’re good to grow! When it’s time for an action, you’ll get a notification

Sensor Tech Specs

Willow Sensor

Tech Specs:

  • Dust & Waterproof Rating: IP54
  • Connectivity: Bluetooth 5.2
  • Battery: Replaceable CR2477 coin battery

Dimensions & Details:

  • Size: 172mm length and 32mm diameter
  • Length with Extension: 247mm Length
  • Weight: 100g
  • Colour: Charcoal, Moss
  • Warranty: 1 year from date of shipping


  • Light: 0 – 100,00 Lux with ±2% variance
  • Temperature: 0°C – 55°C with ±0.3°C variance
  • Humidity: 0% - 100% with ±1.8% variance
  • Moisture: 0%-90% with ±2% variance