I only shut the window to stop them from getting to cold when the lights are off? Is it essential they need fresh air? Or can I just rely on the fan to suck air from the room through the tent? What is perlitre?
Hi all
New to this, I've been growing for about a week now... From cuttings.
Their on from 3pm until 9am temp/humidity is always good.
Around 6/7am some of the tips of the leaves start to droop, But by 5pm the same day they look like they have shot right up again
I'm worried as I've only...