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What is GrowRig?

GrowRig helps you monitor and automate the climate inside a grow tent, box, or room — the temperature, humidity, airflow, and lighting your plants live in — so you don’t have to babysit it by hand.

Think of it as the “brain” for your grow space. You tell it the conditions you want, and it keeps the fans and equipment working to hold those conditions, day and night.

Who it’s for

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You don’t need to be an engineer. GrowRig is built for:

  • Beginners setting up their first tent who want it to “just work”.
  • Hobbyists who’ve outgrown manual timers and want real control and history.
  • Tinkerers who love open hardware and want to see and change how everything works.

If you already run Home Assistant, you’re a step ahead — GrowRig builds on top of it. If you don’t, that’s fine; this guide walks you through the whole picture.

What makes it different

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Most grow controllers lock you into one brand’s app, cloud account, and accessories. GrowRig takes the opposite approach:

  • Local-first — it runs on a small computer in your home. No mandatory cloud account, and it keeps working without internet.
  • Your choice of gear — GrowRig describes equipment by what it does (a fan, a sensor, a light), so you can mix brands and swap parts without starting over.
  • Understandable and safe — every automatic decision is visible and explainable, and your equipment has safe fallback behavior if something loses connection.
  • Open — the software, hardware designs, and device profiles are all open source.

How you’ll use it

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The everyday experience is meant to be simple:

  1. Tell GrowRig about your grow space and the equipment in it.
  2. Set your target temperature and humidity (or pick a recipe).
  3. Let it run — watch live readings, get alerts, and review history.

Behind that simplicity is a small stack of cooperating parts. The next page, How it works, explains them in plain language.

Next steps

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