stressed plants?

someone told me that if the stems of the plant get red lines.. dark red lines, then it means the plant is "under stress"

is this true?

I've never heard that before. Not saying its wrong I just haven't heard that. I did watch a video (Strain Hunters by Green House Seed Company I believe) where they quickly mentioned that some strains, particularly the fruity Sativa strains, can have red lines on them. Check out their India and African videos. It was one of those.

Even if it was true, I wouldn't rely on it unless you happen to know a particular strain really well. I would instead rely on the leaves, growth rate, and overall look of the plant to tell if it was stressed.

that means that it has a phosphorous def.(but if can be strain related aswell) are you plants in flowering?

i grew Afghan Haze x Afghan Skunk and it had red lines on its stem ( fruity sativa)

wel im supposedly growing white widow.. those r the seeds i ordered..

and no they are only around Day 18 in vegging.

so idk if that has anything to do with the strain? or the phophorus like you mentioned

what kind of nutes have you been giving it since it started flowering? my money would be on the phosphorous