Some of the stressors include, but not limited to:

Inconsistent lighting. (not on a timer)
Light leaks.
Overwatering. (root rot)
Cold at night, hot during day. (extreme temperature fluctuations)
Underfertilization, overferting.
Too many additives.
Unnecessary spraying.
Bad soil. (compacted, over-used, uncomposted, too fine of a consistency...)
Bad water conditions. (from the nuclear waste pond or a chlorine factory for instance)
ph fluctations.
Pulling-off fan leaves or overpruning.
Wrong light spectrums.
Insects.
High humidity. (mold)
Hormones/steroids or chemical treatments...

Could be one, could be more than one.
Rusty Trichome Reviewed by Rusty Trichome on . Hermie problems! Hey all, I am having a problem with my girls turning hermie. I grow in a closet and have 2 chambers one for veg and one for flower. i have been in the top chamber several times to look for light leaks and yesterday noticed that the 6" dryer ducting that runs through the flower chamber (venting for veg chamber) had a very very small light leak, hardly noticeable, i fixed that by wrapping the tube with black fabric several times all the way up. Now with a flashlight shining up it i cant see any Rating: 5