Additional Bluetooth Smart Plant Sensor

Willow

№246

£25

~~£0.00~~ £25

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100-day
returns
£90+ free
shipping
next day
delivery
20% for
rewilding

Experts Say

It’s a godsend for anyone who has no idea how to look after their house plants: a sensor system that “gives your plants a voice” – The Australian

Why they made the list

For anyone who finds it tricky to keep their houseplants alive, Willow’s Plant Sensor takes away the guesswork by measuring soil moisture, light, temperature, and humidity, then alerting you when it’s time to water, move, or feed your plants. Compact and discreet, it tucks into the pot without distraction, keeping the focus on greenery rather than gadgets. With its clean design and clear app feedback, it helps ensure your indoor spaces stay lush, vibrant, and full of life.

N.B. This is an additional sensor, designed to expand coverage to another plant for those who already have a Willow hub. This sensor will not function without a hub. Hubs are sold separately within Willow sets here on LOG.

SPECIFICATIONS

Included in Box: 1 x sensor for one plant and 1 x coin-cell battery in sensor
Connectivity: Sensors use Bluetooth to connect to hub (sold separately)
Monitored Conditions: Soil moisture, ambient light, temperature, humidity
Sensor Dimensions: 172 mm length × 32 mm diameter (probe 124 mm)
Probe Depth Compatibility: Up to 200 mm pot depth; large pot extension available separately
Warranty: 1 year

MORE DETAIL

N.B. This is an additional sensor, designed to expand coverage for those who have already purchased a Willow Starter Set or Plant Parent Set. This single sensor requires the hub included in those sets and will not function on its own.

Willow's smart plant sensors are designed to help you monitor the health of your indoor plants with precision and ease.

Each sensor tracks four key variables—soil moisture, ambient light, temperature, and humidity—providing real-time, species-specific care alerts via the Willow app.

You assign each sensor to a specific plant within the app, allowing the system to recognise that exact species and tailor its care recommendations accordingly. Whether you're growing a fiddle-leaf fig or a maidenhair fern, the guidance adapts to what your plant genuinely needs.

The sensors connect via Bluetooth to the hub (sold separately), which then relays data to your phone through your home Wi-Fi.

Sensors measure 172 mm in length with a 124 mm probe, housed in a 32 mm wide body.

Rather than simple readouts, the system delivers contextual advice—factoring in plant type, growth goals (like flowering or foliage), local weather, and seasonal changes.

Each sensor is dust and moisture-resistant and runs on a long-life coin cell battery, removing the need for frequent recharging or fiddly setup.

The Willow app also allows you to track a live health score for each plant, browse detailed care guides, set fertiliser reminders, and even share plant care responsibilities with others.

SHIPPING AND RETURNS

SHIPPING OPTIONS

We offer free standard delivery (Tracked 48) on orders over £90.

Royal Mail Tracked 48 (2-3 business days): £2.95

Royal Mail Tracked 24 (usually delivered next business day if ordered by 2pm the business day before, but not 100% guaranteed): £5.95

N.B. For bladed products a £2 surcharge is added to normal shipping costs, to cover the legally required age verification service, provided by Royal Mail

Royal Mail Next Day by 1pm (guaranteed delivery by 1pm next business day, if ordered by 2pm the business day before. Not available on bladed products): £12.95

For some rural postcodes next day delivery is not possible. For more detail on these postcodes, please see our Shipping page. There is no system check for these postcodes, so please do not select these services if your delivery address falls within this list.

RETURNS

We offer 100-day returns, provided items are returned in a perfectly re-sellable condition (undamaged and in original condition with tags/packaging). For more detailed information on conditions of return and the process involved, please see our Returns policy page.