i asked around and it seams calcium defficiancy is a problem in some areas, and also mostly with sativa strains, also when growing in coco, hope the calcium helped let us know. I am still looking into the calcium, question I thought it was more like silca but it turns out some plants doo need calcium, not like silica where entire harvest can be done with out it.
MadSativa Reviewed by MadSativa on . Calcium Question I've narrowed my problem down to calcium deficiency in this soil. One of my girls is looking really sick, rust spots all over, leaves dying. I added some crushed up seashells to the topsoil to fix it, and did some pruning on some dead leaves. Could I make a foliage spray out of the crushed up shells and some water for the same effect, only faster? Rating: 5