Soil PH Question

[cannalearna]

My PH is 7.2... I know it's high, but I was wondering if it was high enough to start turning older leaves yellow and make them die. This is a soil grow and have been flowering for a week or so. If to high, what is the best way to lower PH.

 

[McBudz]

you should be using pH up and pH down to raise/lower your pH to a desirable level. I like 6.5. But 6.3-6.7 is acceptable. 7.2 is no good. You are locking out nutrients.

here is a chart that shows what nutes get locked out at high/low PH.

 

[cannalearna]

Thanks so much McBudz... that really helps. If I use water that is 6.5 PH will that lower it enough or is it more complex than that?