You do not need to heat your grow room when the grow lights are on. But during the flowering stage, you may need to crank up the heat to ensure the grow room doesn’t get too cold.

Use an electric heater and connect it to your relay. This way, it can automatically switch on when your lights go out.

Learn all about the optimal temperatures for growing marijuana:

More climate related terms:

Climate | Air circulation | Airtight | Charcoal filter | Extractor | Fancontroller | Fans | Hygrometer | Humidistat | Humidifier | Dehumidifier |

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