I have 2 Thin mints clones very healthy when I got them. I transferred them from a 1gal fabric pot to a 7 gal fabric pot with Roots Oganic original soil. They're in a 32"x32"x63 tent with a 600 watt led light about 15in to 18in above the canopy. The temps have been at about 70°f in the day to high 50's to low 60's at night with the humidity at 30 to 45% day and night . I have an 4in exhaust fan and a clip on fan for circulation. Prior to the transfer I was feed the GH flora series at half doses. Hopefully I didn't leave anything out
Probably temperature related. How cold do they get at night? There is nothing wrong with that, and many do lower their temps to achieve color changes.
Update: I got the temperature up to high 70°'s and I see 3 more leaves turning purple and the leaves that were already purple are feeling dry papery. Any thoughts Sent from my SM-G960U using Grasscity Forum mobile app