Well, check the PH again.
You can buy both ph Up and ph Down.
Neutral ph is at 7. Cannabis like a little more acidic, e.g. lower ph.

Other posters here use vinegar or lime to increase acidity and thus lower the ph, or baking or soda powder to make the soil more alkaline and thus increase the ph, but I'm afraid thats not my field of depth.
faithlessxxx Reviewed by faithlessxxx on . My soil PH is too low, please help!! Hi all, I mentioned that the PH level of my soil was 6.1 in another thread and I was told I should be between 6.5 and 7.5. Someone suggested that I add a little baking soda into my water. How much should I add? The leafs are starting to turn a little light in color, and some of the leafs have this tiger like pattern on them. I want to fix this ASAP, please advise as to how much baking soda to add per gallon and any other suggestions. THANKS!! HM Rating: 5