Willow Plant Sensor Review: Irish Times Hands-On for Houseplant Care

A fresh Irish Times hands-on from Saturday, September 5, 2026 revisits the Willow houseplant sensor hub—soil, light, temperature, and humidity rolled into a plant happiness score. It is plant-gadget news with hard prices and clear limits, not another vague “AI gardener” pitch.

What Willow actually is

Ciara O’Brien’s Irish Times review describes a system built around a USB-C hub, coin-cell soil sensors, and an app that advises based on plant species. Sensors track soil conditions plus light, temperature, and humidity, and alert you if conditions stay poor. After a few days of data, the app surfaces a plant happiness score—a single number that is easier to act on than raw moisture graphs at 7 a.m. before coffee.

The point is not lab-grade agriculture. It is a feedback loop for people who underwater monstera in winter and then overcorrect in July. Species-aware advice is the differentiator versus a bare Bluetooth probe that only dumps percentages without telling you what to do next.

Specs and price (Mighty Gadget)

Mighty Gadget’s review lists the practical numbers: Starter Pack £34.99 (one sensor + hub). Sensors talk to the hub over Bluetooth 5.2; the hub uses 2.4 GHz Wi-Fi. You can run up to 40 sensors per hub if your apartment becomes a greenhouse. Each probe uses a CR2477 battery, takes readings about every 15 minutes, and carries an IP54 rating for the messy reality of soil and watering cans.

Optional Willow Grow runs £25.99 per year or £3.29 per month for Disease ID, extra data, Plant Doctor, and related features. Core monitoring works without the subscription; pay later if Disease ID proves useful on your actual plants rather than on marketing screenshots.

Limits to know before you buy

Mighty Gadget notes no HomeKit or Home Assistant integration, and the plant ID library still has gaps. If you want sensors that vanish into Apple Home automations or a Home Assistant dashboard, Willow is not that product yet. If you want a dedicated plant dashboard with a clear happiness score and a known starter price, the kit is unusually concrete for this category—and that is rare in plantes-planet gadget coverage.

Rocks take

At roughly £35 for hub plus first sensor, Willow is a low-risk experiment for anyone who kills houseplants on a schedule. Pair the Irish Times hands-on with Mighty Gadget’s spec sheet, skip Grow until you need Disease ID, and add sensors only after the happiness score stops lying about overwatering. That is the honest plantes-planet read for September 2026—useful, priced, and clear about what it cannot do.

Sources: Irish Times, Mighty Gadget.