hello m8 im doing a coco grow with some cheese clones i got, first time im normally a hydro grower,im using canna coco nutes with pk13-14,hygozyme,and playgrons greensensations,with a 600hps,i have not hadany problems so far im in weeks 6 of flower,purple stems could be a couple of things temps to low purple traits in the strain or indica influance or as you said nute def,your problem is;nt that badso i would;nt worrie to much good luck with your grow,

p.s. what strain you doing:jointsmile::jointsmile::jointsmile: