Hey everyone!
I’ve been building OpenGrowBox for the past years and wanted to properly introduce it here. It’s a free, open-source Home Assistant integration that turns HA into a fully autonomous grow room controller – no cloud, no subscription, no YAML hell.
What it does:
- Full climate automation – temperature, humidity, and VPD controlled 24/7
- Day/night profiles with separate targets for lights-on and lights-off
- Lighting schedules with automatic phase management
- CO₂, ventilation, irrigation, heating and cooling control
- Multiple control modes to fit different grow styles
- Supports unlimited independent grow rooms in one HA instance
- Works with any HA-compatible device – Zigbee, Z-Wave, ESPHome, Tasmota, MQTT, Govee and more
- Fully local – no cloud, no account required ( but available if needed )
- Beautiful custom UI built directly into Home Assistant
How the label system works:
No complex automations to write. You move your devices into a room in HA, add a label – “Exhaust”, “Heater”, “Light”, “Pump”, “CO2”, “Climate” etc. – and OpenGrowBox picks them up automatically. It reads all your sensors, calculates VPD in real time, and switches devices to hit your targets. Supports 30+ languages for label detection.
Roadmap (Premium):
- PID & MPC controllers for rock-solid VPD accuracy (±0.05 kPa)
- Strain database with 40,000+ strains and optimal grow parameters
- Deep grow analytics & plant intelligence
- AI-powered cultivation decisions
- Remote access via opengrowbox.net
The free community edition covers everything most growers need – Premium is for those who want to go further.
Install via HACS – search “OpenGrowBox”
GitHub: Happy to answer any questions about setup, hardware compatibility, or the architecture. Happy growing! 