Humidity Concern!!

I have a humidifier yet it's not automatic. I have been keeping an eye and trying to maintain my grow tent around 60% rh yet it fluctuates from 58 to 63 in less than 30 minutes when the lights go off. Is 5% maybe even 10% difference for a short period of time going to stress out my girls?

It's nice to see you are worrying on your girls, but your concern is a bit too much.

noles00235 said:

yet it fluctuates from 58 to 63 in less than 30 minutes when the lights go off.

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This is because when the lights go out the plants stomata remain open for a while, transpiring moisture. If your ventilation system cuts out when the lights go off then the RH% can spike. Often a dehumidifier is required.

Just be ready to prevent that lights out spike during flowering. The change in humidity isn't a problem but high humidity during flower is an issue because you can get botrytis (bud rot) if the RH% goes above 50% and you have good sized buds.