my friend and i last winter wanted to creat the same kind of instante in a grow room , to try an increase yield and make it purple . we did this by puting ice cubes at the base of the plant on top of the dirt,misting the plant with ice cold water,and zero lights for 2 days before harvest.
if it gets worse remoe the leaves , if the stem of those leaves are yellow they are probly dying leave so pick them offf to keep the rest of the plant safe;]
all leaves about a foot from the bottom have fallen off, what going ...never grown before ,nd my plants are about 4 1/2 feet tall,outdoor, and about 3 or 4 months old. they havent started flowering yet either from what i can tell.