drudown idk about you but I've noticed that stem color can sometimes be a poor indicator of phosphorus deficiencies. I am guessing thats why you're asking about the stem color? I think it varies greatly by strain. I have a strain that always grows with red stems and loves it, but it also doesn't have any purple color changes in the bud or anything like that without being forced.

However, stem color can definitely be an indication of that under the right circumstances.
Minnesnowta Reviewed by Minnesnowta on . 6 weeks into flowering, having a problem... help! + rep to anyone that can help. I'm just under 6 weeks flowering with some bag-seed I got from my boy, he claims it was was sour diesel from our other boys bag & I was sketchy about it, till it started smelling, it smells just like sour d. I don't know anyone agrees or disagrees from the pictures, but I'm not sure. Anyways, the bottom leaves have been yellowing slowly from the tips inward & the bottom branches have been falling off one by one after yellowing completely, and now there's these Rating: 5