GrowFAQ :

What range should I maintain for my growroom humidity and temperature?

  Added by: MisterIto  Last edited by: 10k  Viewed: 873 times  Rated by 19 users: 8.71/10
Daytime conditions should be 70-80 degrees without co2, 80-90 degrees with co2 until the last two weeks when daytime temps should be kept between 70-80 and co2 can be reduced to adjust for the lower metabolism. Night temperatures should be kept above 60 degrees to prevent stress. It is preferrable during flowering to have a night temperature drop of 10-20 degrees to stimulate flowering hormones and reduce stem elongation.

I find that low humidity causes stress on plants. I recommend 50-60% humidity until the final 2 weeks of flowering. At this point, the humidity should be lowered as much as possible to encourage the plant to seal and protect itself with additional resin. (I am able to get the humidity to go as low as 31%) I have been able to frost things up considerably this way. The higher humidity levels prior to final ripening reduce salt levels within the plant tissue and encourage healthy, more lush growth.
  Last modified: 05:24 - Nov 10, 2000 
Quicklink:  http://overgrow.com/growfaq/44
GrowFAQ © 2000-2004 Overgrow
faq:44 "What range should I maintain for my growroom humidity and temperature?"