GMSgrowsanswered grow question 4 years ago If you grow in coco drop your ph to 5.8 and the feed can start at 400 ppm and work your way up every week by 100 ppm if your seeing good growth. I grow in straight peat, same as coco except dont need to add cal/mg. Dont add any more cal/mg for at least a week now. Kind of young to be needing any. I would wait until you actually see they need cal/mg. She took to heavy a hit for being a baby.,Cheers