Sensor

Sensor

  • ¥4,600 JPY
    Sale price  ¥4,600 JPY Regular price 
    Skip to product information
    Sensor

    Sensor

    ¥4,600 JPY
    Sale price  ¥4,600 JPY Regular price 

    Here’s your hand-sized horticulturist! Our award-winning Sensor knows your plant and helps you care for it accurately without stress or guesswork.

    Please note you need a Hub for the Sensor to work.

    ColorMoss

    Award winning

    1 year warranty

    Fast shipping

    Details

    Sensor
    172mm length x 32mm diameter

    Packaging
    195mm x 100mm x 40mm

    Weight
    55g

    Moisture probes are 124mm in length and suitable for pots up to 20cm (8”) in depth. For deeper pots, add the Large Pot Extension.

    Benefits

    Not another 'moisture stick'. This is next level care.

    • 24/7 Monitoring: Informed advice rather than one-and-done readings.
    • Personalised: Light measured against your growth goals (thrive or survive) and moisture levels calibrated to your soil type.
    • Location-Based: Plant care that considers seasonality, plant dormancy and local weather integration.
    Shipping

    Shipping details

    Orders are dispatched from our Perth and Melbourne warehouses, and shipped with Australia Post.

    Standard International Shipping
    Prices and delivery speed vary by country

    Warranty & returns

    Willow is made to last. Our products come with a 1 year warranty.

    We want you to be happy with your purchase. We provide a replacement for any product deemed faulty or damaged.

    Find out more about our warranty and returns policy.

    Our connected ecosystem

    Your plant texts you when it's thirsty.

    Willow's Sensor measures soil moisture, light, and warmth. The free app provides a live Plant Happiness Score, care list, and alerts instantly.

    How Willow works

    Three parts, one simple job

    Your plants don't speak - so we built a clever little ecosystem that does it for them.

    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.

    light sensor

    temp + humidity vents

    soil moisture probes

    01. Sensor

    In your pot

    Two soil moisture probes, plus a light sensor and temp + humidity vents, in one moisture meter for plants that stays in the pot.

    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.

    willow hub

    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.

    Willow humidity meter

    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.

    Getting started

    Up and running in minutes.

    No tools. No expertise. Push the Sensor into the soil and Willow takes care of the rest.

    1

    Unbox

    Scan the QR code to download the Willow app on iOS or Android.

    2

    Connect

    Connect - Link up your Hub and Sensors in minutes.

    3

    Plant

    Push the Sensor into the soil. Willow starts tracking your plant's data.

    4

    Care

    Follow personalised care tips and watch your plants flourish.

    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.

    Plant with Willow App

    Plant care made easy

    4 (340)

    What's in the app

    Every Willow Sensor comes with the free Willow app.

    Alerts

    Notifications from your plants delivered straight to your phone.

    Plant score

    Live happiness score out of 100, updated hourly.

    Fertiliser schedule

    Give your 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. Over 1200 species included.

    Care guides

    Expert-backed advice from our horticulture team for every plant type.

    Want more? Try Willow Grow

    Optional subscription. In-depth data, Plant Doctor consults and disease ID.

    Compare plans

    built to last

    Custom hardware. Serious engineering.

    Willow wasn't built from off-the-shelf parts. Every component was chosen or designed for a specific reason - from the chipset to the probe depth. Two years of development, one very small Sensor.

    Slideshow

    Early Sensor prototype
    Early work on prototypes
    Good Design Award Winner

    12mo

    Battery life of CR2477 coin cell

    15min

    Soil moisture reading interval

    1200+

    Plant species in the app

    • 5 stars: 49 (84%)
    • 4 stars: 6 (10%)
    • 3 stars: 2 (3%)
    • 2 stars: 1 (2%)
    • 1 star: 0 (0%)
    O
    O. P.

    I used to kill plants merely by looking at them. Now, my monstera game is strong and I’ve graduated to four living plants that yell at me when I’m being neglectful. Cannot recommend this system highly enough!!!

    R
    Richard D.

    My plants have been thriving since investing in Willow, and as someone who used to struggle to keep any houseplant alive this is saying something. The app instructions are easy to follow, and it has given me the confidence to get more plants to brighten up my home.

    J
    James

    Added this to my existing set up. They are great

    T
    Thomas

    Extremely speedy delivery. Really helps me stay on top of looking after my plants and friends often ask how I manage to keep them all so healthy.

    C
    Carl

    Quick delivery and great item

    l
    lyn Thomson

    I and my now vocal plants like the Willow sensors. They can tell me want the need. I looked after them before but i wasn’t a mind reader.

    Ive had the Willow sensors a week and they are looking healthier already.
    I would recommend for sure.

    E
    Eric

    Love the data it provudes.

    S
    Stevie Blair

    I love this company so much I bought another sensor. If like me, you're not very good at looking after your houseplants then this is for you! It lets you know what the plant needs and in a comical way too.
    Highly recommend Willow 😊

    D
    Dawn S.

    These are game changers for keeping house plants healthy through the winter. Helps prevent overwatering, manage humidity levels, and light needs. My plants are flourishing this winter. I’ve bought many and will purchase more in the future.

    We're thrilled to hear your plants are flourishing! Thanks so much for your support 💚

    e
    eva olczak

    Excellent product. This is the third one I have ordered.

    T
    Terry E.

    These guys are the best thing since sliced bread. Meant I have been able to dive into indoor plants and none have died…oh I lost one cause it was sitting in water.

    This made our day! Thanks so much 🌿

    E
    EUNICE JAMES

    This set up has turned me from a plant murderer to a plant enthusiast!

    e
    eva olczak

    Never been good with housplants so decided to take the plunge and buy the starter kit. The product us fantastic . Its making looking after houseplants much more with the information that is provided. I can monitor the plant and make any change’s necessary to keep it healthy. So much easier than guessing. Ordered yet another sensor for a new plant.

    J
    James

    Expensive but they do work

    L
    Louise K.

    The Willow standard sensor is an elegant and smart companion for your indoor plants. Combined with the Willow Hub and mobile app, it gives you a window into your plant’s world — tracking vital factors and helping you care more confidently.

    We are blown away by your kind words Louise, thank you! 💚

    J
    Julie D.

    Of all the sensors and monitors out there, I have found Willow to be the best product to complement managing your indoor jungle. It’s suitable for beginners right through to those with years of experience across many different types of plants. For me, someone that needs that additional help with watering and monitoring of the other important factors like temperature, humidity and light, this provides just the right level of support to keep my plants healthy and happy.

    J
    James C.

    Very happy with my willow system - it took a couple of attempts to get the hub to sync up, but now its running it seems to be very smooth and reliable.

    S
    Sara

    Keeping my plants off death row every day!

    S
    Sonja D.

    Super easy to set up the hub and sensors, and to add on any additional sensors. App is very easy to navigate, takes all the guess work out of when to water and feed your plants. Impressed with the number of sensors that can be connected to one hub. Initially used on plants that were struggling which are now thriving thanks to Willow.

    R
    Rashid A.

    Excellent product that really helps with under/over watering

    Thanks Rashid 💚

    S
    Sarah A

    These sensors have been a saviour when it comes to my overwatering habits! My plants are finally thriving and I'm enjoying their sassy pants notifications on the app.

    Amazing feedback, Sarah! Thanks so much 💚

    O
    Owen B.

    Love these saved me killing my plants

    P
    Philip C.

    An extra one to add to the pack I bought. Brilliant bit of kit

    We love to hear it Philip !🤩

    N
    Natasha D

    Makes looking after your plants so much easier and so successful.

    We're happy to hear that Natasha, thanks for the great feedback!🌿

    C
    Catherine Black

    The product will not connect to bluetooth even after do the steps required. Very disappointing.

    A
    Allison C

    It lets me know when to water and feed my plants. It's a fantastic product that has saved my peace lily

    Amazing news, thanks for your feedback Allison! 🤩

    A
    Ally M

    I love the quirkiness of the alerts which are so simple to follow. The information in the app is incredible and highly educational. I know now from using these products that I could grow and maintain any plant due to the simplicity of Willow. seensors along with what information is required

    B
    Brittney D

    I purchased one of your sensors from Bunnings a month ago and I'm obsessed with it! I feel like I can see a different in my plants already. I've tried a few other brands but yours is definitely the best one I've tried.

    Amazing feedback Brittney! We are so glad that our Sensors have been helpful🌿

    B
    Belinda M

    Willow keeps my plant alive - no more over or under watering

    S
    Seona

    Gives me more confidence in caring for my plant

    R
    Richstev

    I love that it tells me how much to water the plant so that I don't kill it

    W
    Will D

    It feeds information though the phone which makes it easier to keep it alive and do what's best for it. Well if you want something to stop killing your plant, I recommend this

    Got questions?

    Know before you buy

    Is Willow right for me?

    Have you added to the 72 million plants killed per year by Aussies? If that's a yes, then Willow is for you. Whether you’re tired of guessing what your plant needs or just want simpler, stress-free plant care, Willow helps you get it right with no more guesswork.

    Do I need the Hub?

    Yes, the Hub is essential for your Sensor to work its magic. Think of the Hub as the brains of the operation, while the Sensor is the eyes and ears.

    How many Sensors can be paired to one Hub?

    You can connect up to 40 Sensors to one Hub within range. That’s a lot of plants!

    Can I keep my Sensors and Hub in separate rooms?

    Yes, your Sensor and Hub can be in separate rooms, as long as they’re within the Bluetooth range (around 20 metres).This setup works well for most single-level homes. If you’re in a split-level or larger space, we recommend adding a second Hub to keep everything connected.

    Is the Willow app free?

    Downloading and using the Willow app is free, including but not limited to:

    • Pairing your Sensor and Hub
      Get your devices connected and start gathering plant data
    • Plant ID
      Scan and identify your plant type in one click with 5 scans per month included
    • Track key plant events
      Log your plant’s care actions and milestones. The Sensor detects when the plant’s been watered and will automatically add this for you.
    • Plant library
      Access our exclusive plant library with over 1200 and growing! Built by our team of horticulturists, each plant’s care guide is bespoke to its species. No more Google searching and contradicting advice. 

    Want to take your plant care to the next level? Unlock more amazing features with Willow Grow.