Red Stalk Stems, and Leaf stems can be a varity of things I believe. I am also constantly bothered with the Red stem plaque.

hahha

From what I have read the things to check are,,, Micro Defs, and also Phosphours Def. (sry I suk at spelling)

A folier spray with half strength Micro Def solution Or Bloom solution CAN SOMTIMES help this.

I don't know a whole lot about what the problems are, Except that It seems to be a common trend in my growing.

Those are the things I do to try and battle it.

A Picture would help the better more educated users of the forum Get you setup with a solution. (the over nitrogen thing I haven't herd but I imagine if your leafs are really really dark dark green that could be it)

My 2 Cents

Good Luck

kd:thumbsup: