stems

i have two plants in there 4 week of flowering i have noticed that the stems are starting to turn red . What is that help please.

i take it its the stem between leaf and main stem, this is o.k. maybe needing a feed

I find coldness turns the stems purple in flowering, same thing happened to my plant. Fant was blowing at the same spot for 12 hours, PURPLE!!!!

YAY! A CLEAN POST!