Gmix said:

The humidity thing is a range.
Ie optimal conditions
In reality you can get away with out controlling it as long as you’re not in flower & it goes over 65 & you have sufficient airflow

Lows won’t do damage you just won’t have optimal conditions.

Mine tents humidity is controlled by the weather it bounces around as long as it doesn’t go over 65-69% I don’t concern myself with what it’s sitting at & my grows come out fine.

I know a few here in the same boat

I would agree optimal conditions would make difference however from what I’ve seen over the years it’s not significant enough to cause problems with either growth.

Mold takes hold above 70% as long as your below that & have good airflow it’s not a major issue.

So if your on a shoe string budget you could live without controlling it as said as long as it doesn’t go over 70%

Good luck and enjoy the adventure

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