It could be the soil, since it has ferts in it. ?I was leaning more tword strain because of the purple stalks/stems. I also read somewhere that purple is caused by either strain or cold temps. I definitely do not have cold temps...but the temps do fluctuate more than I'd like. I guess as long as they are growing..............lol. I'll update once I get the ph and soil and temps sorted out. Thanks Weedhound. S