I like 40%, but will go as high as 50%. Have gotten mold in Grapefruit and LUI at 55%. Peace GS
70% RH through end of stretch , and as low below 50% as possible till end of cycle , but major air exchange twice per minute is your friend unless runnin a sealed room , and.......
In that case keeping ambient room temps within a 10 degree variable between lights on and lights off will help prevent condensation during lights off when RH goes waay up during mid-late bloomage.......
Lack of air circulation "through" the plants are your worst enemy while in swellage mode , so keep the insides cleaned out gradually with all fans with a stem removed after complete end of stretch is over till they`re all gone , and if they still keep poppin out , you have too much N left in your mix , so adjust accordingly.......
Peace....DHF...........
I am actually running a sealed room with a 5 ton AC ductless split with 2 heads. I have all my fans turned off during the dark period, is that possibly what my problem is? Should I be leaving them on 24/7?
Fans have to run 24/7!!!!!!!
Well CB.....Tell us about your environmental control in place that allows you to grow with 80 degree temps and 90% RH during lights on and off......its temps you need to worry about. Ive grown in 90%+ humidity rooms with temps around 80 and have never seen mold once in 15 years.
Well CB.....Tell us about your environmental control in place that allows you to grow with 80 degree temps and 90% RH during lights on and off......
I`m just sayin......I live in the Hell of the deep dirty south with RH as you talk about , but without SERIOUS attention to airflow and filtration into and out of each of my fliprooms , airborn pathogen possibilities were inherent from constant perfect conditions for em to form , grow , and proliferate.......so.....that said......
Gotta respectfully disagree about temps bein the only factor to be watched out for concerning airborn pathogen formation in ANY grow area , cuz NOTHIN could be further from the truth IME , but I digress......
Please come back with your thinking behind this theory.....
Peace....DHF...........