How It Works

Plant care, made measurable

The science of green thumbs, in one clever Sensor

Years of R&D, a Good Design Award, one small device that listens to your plants - so you don't have to guess

35+

countries

4.5/5 stars

01. Sensor

Collects data about your plant's conditions

02. Hub

Connects to your Sensor and sends data to the cloud

03. App

Tracks plant happiness scores and sends alerts

Let your plants do the talking

Our clever, easy-to-use ecosystem gives your plants a voice, telling you exactly what they need – no green thumb required.

What we measure

The four things that make or break a plant

Get any one of these wrong and your plant tells you - usually a few days too late. Willow tells you first.

01. Sensor

In your pot

Real-time alerts, expert tips, and everything you need to keep your plants thriving - all in the free Willow app.

Soil moisture

Never over or under water again.

Two probes read moisture every 15 minutes. Willow factors in species, soil type and the season, pings you when it's time to water and checks in after to see if you got it right.

Light

Find the right spot. No more guesswork.

LUX

Track ambient light throughout the day and get suggestions for better placement based on your plant’s needs.

Humidity

Say goodbye to crispy, droopy leaves.

Monitor humidity swings and get notified when conditions drift outside your plant’s comfort range.

Temperature

Comfy conditions, year-round.

°C / °F

Keep an eye on hot/cold spikes, and get recommendations to stabilize temperature around your plant.

02. Hub

In your home

Small but savvy. Plugs into a wall outlet and sends your plant's data to the app, anywhere, any time.

03. App - free to download

In your pocket

Alerts from your plants, plus expert tips and everything you need to take the guesswork out of plant care.

The Willow experience

Data driven plant care

No more guesswork. Data is translated into simple, actionable steps so you know when to water, to reposition your plant, or adjust the room's conditions.

Sensor monitors

Logging every 15 minutes

Tracking of moisture, light, temperature and humidity - all day, every day

Willow nudges

A friendly heads-up on your phone

Outside of the healthy bounds for too long and Willow will intervene to prevent harm or assure healthy growth

You step into action

Water your plant

Actions can be auto cleared by Willow based on data or ticked off by yourself

Willow analyses

Your plant says thanks (or not)

Post-watering feedback to let you know if you nailed it or need to return with the watering can

Event gets logged

Every event, saved to history

Track changes and spot patterns. Gain a deeper understanding of your plant’s natural rhythm over time

Plant happiness scored

A rolling score out of 100

Our algorithm to truly let you know how your plant is feeling

Start your Willow experience today

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Works with your smart home

Set it once.
Willow does the rest.

Connect to the smart home you already have, and small problems get sorted before you even notice.

01 Connect

Link with Homey.

02 Sense

Willow reads soil, light, warmth and humidity.

03 Automate

Set simple "if-then" rules in a couple of taps.

04 Relax

Your home acts on its own, day and night.

Tech specs

The numbers

Sensor Hub

Power

12 mo

Replaceable CR2477 coin cell

Water rating

IP54

Splash proof

Range

~20m

Bluetooth 5.2 to your hub

Size

172mm

100g * 32mm diameter

Power

USB-C

230V, 50Hz AC

Dust & waterproof rating

IP54

Robust for daily indoor use

Connectivity

WiFi

Wi-Fi 802.11 b/g/n (2.4Ghz), Bluetooth 5.2

Size

74mm

80g * 32mm high

Plant care in your pocket

Your plants, finally with a voice

Real-time alerts, expert tips, and everything you need to keep your plants thriving - all in the free Willow app.

Care that feels personal

Willow isn't just useful. Name your plants, set their goals, pick a tone - it's made for how you actually live with them.

Alerts

Actionable items to keep your plants happy

Plant score

Check in to see how your plants are doing

Fertiliser Schedule

Give your plants the boost they need

Events & milestones

Track your plants' progress (and yours!)

Plant ID

Snap a photo to ID any plant

Care guides

Learn how to care for all your plants

Plant with Willow App

Plant care made easy

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What's in the app

Every Willow Sensor comes with the free Willow app.

Alerts

Notifications from your plants straight to your phone.

Plant score

Live happiness score out of 100, updated hourly.

Fertiliser Schedule

Give you plants a boost right on time.

Events + milestones

Capture your plant's progress.

Plant ID

Scan, tap, identify. Know what you're caring for in seconds.

Care guides

Expert-backed advice for every species from our horticulturists.

Frequently asked questions

Most solutions measure just one thing — like moisture or sunlight — and give you a number without any context, leaving you guessing on what to do next. Willow knows your specific plant, understands its environment, and factors in things like location, seasonality, and weather. Then it turns all the complexities of plant care into simple, timely alerts that tell you exactly when and how to care for your plant.

Our Sensor is intended for indoor use with houseplants only. The great outdoors can feature heavy rains or snow, prolonged harsh sunlight, or extreme temperature changes compared to the relatively controlled indoor environment. The tech inside the Sensor is safeguarded well for indoors but risks getting damaged in an outdoor setting.

For the best Willow experience, use one Sensor per plant at a time. Your Sensor is paired up per your plant’s type in the app during setup so it can monitor your plant’s species-specific preferences. In the event your original plant is thriving and you’re feeling confident to switch the Sensor to another plant, you can easily move it! Just unpair it from the first plant in the app and pair it up with the new one.

Read all FAQ

Get your (green) thumb ready

Take a peek inside the world of Willow with our app! It's free to download and packed with plant-y of features to level up your plant care game. Get timely alerts straight to your phone whenever your plant needs care.

Plant with Willow App

Plant care made easy