striped red stem

these were taken just a couple of minutes seen RED LEAVES on just one plant. Could this be of low temps, a sign of getting ready for harvest...... Thoughts or opinion ??

I recently started my first cannabis grow. I'll try to keep it short and simple. I'm using RO water along with cal mag plus resulting at 110 ppm. Fox farm ocean forest soil. Water ph 6.4. My two clones (purple Punch&Green Crack) have began LST (no top/fim) after transplant a week ago are...

If you've ever run into red stems in your growth, then you've probably done your fair share of research on the subject. The majority seem to think this is a result of a Phosphorus deficiency and many say it's genetics. There are also a few who have suspected LED Lighting (Spectrum) to be the...