--- title: "Plant Monitor" description: "Plant Monitor is a Marketplace integration for Home Assistant. It has 5.3k installs sharing analytics and was last updated October 27, 2026." canonical: "https://vulpo.app/integrations/marketplace/olen-homeassistant-plant" url: "https://vulpo.app/integrations/marketplace/olen-homeassistant-plant.md" last-updated: "2026-10-27" version: "1.4" --- # Plant Monitor > Plant Monitor is a Marketplace integration for Home Assistant. It has 5.3k installs sharing analytics and was last updated October 27, 2026. Plant Monitor is a custom integration that treats each plant as a device with its own sensors, thresholds and health tracking. Species data, thresholds and images can be fetched from OpenPlantbook, and without it the thresholds are entered by hand. Each plant can be linked to source sensors for temperature, soil moisture, conductivity, illuminance, air humidity, CO2 and soil temperature. It also calculates daily light integral from illuminance and vapour pressure deficit from temperature and humidity. Every minimum and maximum threshold is its own number entity, so it can be changed from the UI or by automations. Problem triggers can be switched on per measurement, and an action replaces the source of a plant sensor. Setup is done in the UI as a custom repository. Automatic summary of the README and code of Olen/homeassistant-plant. Something wrong, or are you the maintainer and want your own text here? [Get in touch](https://vulpo.app/contact) Not in the Marketplace catalog. Add as a custom repository in the Marketplace. ## Supports - **Device triggers**: Its devices can start automations directly. - **From the Marketplace**: Installed through the Marketplace, formerly HACS. - **Actively maintained**: Its author released or pushed a change in the last six months. ## Setting it up Add its repository to the Marketplace as a custom repository and install it, then restart Home Assistant and add it under Settings, Devices and services. ### Configure a plant - **Plant name** - **Species**: Will be used for searching OpenPlantbook ### Select species from OpenPlantbook - **Search for a different species** - **Species** ### Select sensors - **Fill sensors from device**: Pick a device, such as a soil sensor, and submit the form to fill the fields below from its entities. The form opens again so you can review them before continuing; fields you have already set are kept. - **Temperature sensor** - **Soil moisture sensor** - **Conductivity sensor** - **Illuminance sensor** - **Air humidity sensor** - **CO2 sensor** - **Soil temperature sensor** ### Set limits - **This is the plant I was looking for** - **Plant species to display** - **Max soil moisture (%)** - **Min soil moisture (%)** - **Max illuminance (lx)** - **Min illuminance (lx)** - **Max DLI (mol/d⋅m²)** - **Min DLI (mol/d⋅m²)** - **Max temperature (see above)** - **Min temperature (see above)** - **Max conductivity (uS/cm)** - **Min conductivity (uS/cm)** - **Max air humidity (%)** - **Min air humidity (%)** - **Max VPD (kPa)** ### After setup - **Illuminance check days** - **Species** - **Force refresh data from OpenPlantbook** - **Plant species to display** - **Image URL. Will be automatically updated if species is found in OpenPlantbook** - **Use illuminance as problem trigger** - **Use daily light integral (DLI) as problem trigger** - **Use air humidity as problem trigger** - **Use conductivity as problem trigger** - **Use soil moisture as problem trigger** - **Moisture grace period after watering (seconds, 0-86400)** - **Use temperature as problem trigger** - **Use CO2 as problem trigger** - **Use soil temperature as problem trigger** - **Use VPD as problem trigger** - **Fill sensors from device**: Pick a device, such as a soil sensor, and submit the form to fill the fields below from its entities. The form opens again so you can review them before continuing; fields you have already set are kept. - **Temperature sensor** - **Soil moisture sensor** - **Conductivity sensor** - **Illuminance sensor** - **Air humidity sensor** - **CO2 sensor** - **Soil temperature sensor** Texts from the code of [Olen/homeassistant-plant](https://github.com/Olen/homeassistant-plant). ## Entities - **Numbers**: Max soil moisture, Min soil moisture, Max temperature, Min temperature, Max illuminance, Min illuminance, Max DLI, Min DLI, Max conductivity, Min conductivity, Max air humidity, Min air humidity, and 7 more - **Sensors**: Soil moisture, Temperature, Conductivity, Illuminance, Air humidity, CO2, Soil temperature, PPFD, Total light integral, Daily light integral, DLI (24h rolling), Vapour pressure deficit ## Actions - **Replace sensor**: Replaces the source for a plant sensor. Fields: Meter entity, Sensor entity ## Troubleshooting - **Diagnostics**: Downloads a diagnostics file to attach to a bug report. ## From the README > A comprehensive plant monitoring integration for Home Assistant that treats each plant as a device with its own sensors, thresholds, and health tracking. Automatically fetches species data from OpenPlantbook to configure optimal growing conditions. > > - 🖥️ UI-based setup — guided multi-step config flow with optional OpenPlantbook search > - 📊 Per-plant thresholds — each threshold is its own entity, adjustable from the UI or via automations > - 🌤️ Daily Light Integral — automatic DLI calculation from illuminance sensors > - 💧 Vapour Pressure Deficit — automatic VPD calculation from temperature + humidity > - 🔄 Live updates — change sensors, thresholds, species, or images without restarting HA > - 🚨 Problem detection — configurable per-sensor problem triggers > - 🔌 Auto-disable — sensors without a source entity are automatically disabled From the README of [Olen/homeassistant-plant](https://github.com/Olen/homeassistant-plant#readme), [GNU GPL v3.0](https://spdx.org/licenses/GPL-3.0.html). Shortened. ## At a glance - Kind: Marketplace integration - Category: [Garden and plants](https://vulpo.app/integrations/category/garden-and-plants.md) - Number: 5.3k installs sharing analytics; 876 GitHub stars - Connection: Connection not stated - Upkeep: Updated in the last 6 months - Needs: Added as a custom repository in the Marketplace - Latest version: v2026.9.0, last updated October 27, 2026 - Domain: `plant` - Source: - Issues: - Screenshot: https://vulpo.app/integrations-img/3d665ec4debaea19.webp (from Olen/homeassistant-plant's README) - Screenshot: https://vulpo.app/integrations-img/35053d09cad5bb68.webp (from Olen/homeassistant-plant's README) In Vulpo: Plant card ## Plant Monitor in Vulpo Plants from Plant Monitor get their own Plant card, with the soil moisture and a health label. - [Download Vulpo on the App Store](https://apps.apple.com/us/app/vulpo-for-home-assistant/id6758255800) Independent directory, made by the developer of Vulpo. Not affiliated with Home Assistant or the Open Home Foundation. [About these numbers](https://vulpo.app/integrations/about) Last updated 2026-10-27. Source: https://vulpo.app/integrations/marketplace/olen-homeassistant-plant --- - HTML version of this page: https://vulpo.app/integrations/marketplace/olen-homeassistant-plant - Site index for agents: https://vulpo.app/llms.txt - Everything in one document: https://vulpo.app/llms-full.txt - All pages: https://vulpo.app/sitemap.xml