GroErr
Well-Known Member
In flower I use an 80 (Temp)/55 (RH) rule and target within +-2 of that figure, it's worked well for me. I'd like to actually target more like 80/60 because I've seen better results but my area is terrible for PM and if I go beyond 55% RH (particularly during the dark cycle) it shows up at some point. According to this VPD chart it's not an ideal range but it's not practical to target the most beneficial ranges according to the chart or you'd likely end up with mold/PM.Hmmmm... some say 80 to 85, some say higherish, and evidently some like it lower... now i am confused about temps...lol
According to this article/chart ideal Temp/RH ranges are shown in brown/orange:
Here's a link to the full article...
http://www.just4growers.com/stream/temperature-humidity-and-c02/vapor-pressure-deficit-the-hidden-force-on-your-plants.aspx