I don't have any grow logs here (yet), but 70-85 RH seems a bit steep to me. Different people like different humidity levels for different reasons; temperatures, C02 usage, etc. Personally, I keep mine between 40-60 during most stages of growth. Any less than that and it seems to affect the growth and health of the plant, any more (at least in flowering) and the buds seem to be much more susceptible to mold.

Just my :twocents:, for what it's worth.
Mr. Clandestine Reviewed by Mr. Clandestine on . Humidity Levels FIRST OFF . . . please dont hate cuz i suck at spelling . . .:( Hey guys, I just had a simple question and i was hoping to hear an answer from some of the people who have grow logs on here (cuz i know your information is correct). I have recently been arguing with a few grow colleges about the humidity levels when the plant is in the 12/12 bud cycle. One college(advice A) says 30-45% is perfect and another college(advice B) tells me to jump it up to 70-85%. Right now i am trying to raise Rating: 5