Robertsanswered grow question 4 years ago You are definitely deficient in cal mag. But also nitrogen. Need to slightly up your nutes and up cal mag. Especially if growing in coco coir. Not too much you will burn it. Also make sure you are getting 20 percent run off each feed. Ph could be off and causing nute lock out. If so you nute levels might be right. So it's one of 2 options here. Good luck. Happy growing.