Have you got an autoflowering strain? If not they wont start flowering until you swap their light schedule to 12/12. Fans are important for three main reasons. They reduce heat so and can control climate. They help the plants produce thick sturdy stems. They help circulate and introduce more co2. And yeah you can leave it on over night. Have them on for as long as your light are on at least.
If you dont have an autoflowering strain then dont change the light cycle to 12/12 until they are at least 12 inches tall. Or begin to show preflowers or produce alternate nodes. This is all explained much better in the grow FAQ, top left side of the page. |