MedUs_0oanswered grow question 5 years ago It should be calcium deficiency with that color, but I see that you are already giving it Cal mag anyway. Now it depends on when you started to give it, if and recently you should wait to see if it improves, the color I see even too dark which is going to excess nutrients, I advise you not to exceed with nutrients and to wait a little earlier to add more. I see, however, it would seem that you are already giving him everything you need or maybe even more. Maybe try to decrease or not add more and wait for the plant to get used to it. Don't panic and be patient. I'm in your same situation,I hope I have been useful to you from the bottom of my experience. Happy work, bye