Sensor Hub
Most plant apps guess from a species database. Botanical Legacy reads the soil. Connect the sensors you already own — through Home Assistant, no extra hub — and every reading anchors a per-plant Digital Shadow that knows when your specimen actually needs water.
Paste your Home Assistant address and a long-lived access token into the Sanctuary's Instruments panel. That is the whole setup — no firmware to flash, no cloud bridge, no new hub to buy.
Botanical Legacy reads your sensors' state roughly every ten minutes — soil moisture, temperature, humidity, light, and conductivity. Room sensors bind to a zone; plant probes bind to a single specimen.
A fresh soil-moisture reading anchors that specimen's Digital Shadow: the model's running moisture estimate snaps to what the probe measured, and the watering schedule moves with the real soil — deferred when the pot is still wet, never on a blind timer.
If Home Assistant can see it, Botanical Legacy can use it. The supported classes are soil moisture, temperature, humidity, illuminance, and conductivity.
The classic plant probe — four readings from one stick (moisture, temperature, light, conductivity), exposed through Home Assistant's Bluetooth integrations.
A capacitive soil probe on a microcontroller, declared as a moisture sensor in ESPHome. Our wiring guide takes you from parts list to a reading on the dashboard.
Zigbee climate sensors, wired greenhouse probes, commercial plant monitors — anything exposing a supported device class binds in the same two clicks.
Every specimen in Botanical Legacy runs a Digital Shadow — a continuously updated model of its moisture, health, and care rhythm. Without sensors, the model works from physics, weather, and your photos. With a probe in the pot, it works from evidence.
Sensor readings override estimation on disagreement. If the model believes the soil is dry but the probe reads 60% moisture, the schedule defers — no reminder fires for a pot that is still wet. If moisture crosses the critical threshold between waterings, you hear about it the same hour, not at the next calendar slot.
The model also learns each pot's drying curve from the sensor history, so two identical plants in different corners settle onto different — correct — schedules.
The Sensor Hub is a Cultivator capability — €38.99 a year, about €3.25 a month. Every new account starts with a 90-day Cultivator trial that includes full sensor support, so you can wire a probe on day one and decide later.
No. Every specimen gets a Digital Shadow that runs on physics, local weather, and photo diagnostics alone. Sensors make it sharper — they replace estimation with measurement — but the app is complete without them.
Anything Home Assistant exposes with a supported device class: soil moisture, temperature, humidity, illuminance, and conductivity. In practice that covers Mi Flora probes, ESPHome builds on ESP32, Zigbee climate sensors, and most commercial plant monitors.
Yes — Home Assistant is the integration path. You paste your instance address and a long-lived access token, and Botanical Legacy reads your sensor states from there. There is no separate cloud account, vendor app, or hub.
Roughly every ten minutes. Soil-moisture readings update each specimen's Digital Shadow and can defer a watering the same cycle; a reading that crosses the critical dryness threshold raises an alert without waiting for the daily schedule.
The token is stored encrypted and is used for exactly one thing: reading sensor states. Botanical Legacy never writes to your Home Assistant, never controls devices, and you can revoke the token from Home Assistant at any time.
Not yet. Automated watering hardware is on the roadmap, and we are not pretending otherwise — today the loop is sensor in, judgement out: the app tells you when the soil actually needs you.
Five specimens free, sensors included in the 90-day trial. The soil has been trying to tell you something — wire it up and listen.