Quote:
Originally Posted by Kelch420
I was just reading about a soil called Promix, has anyone heard of it? Also it says Promix also contains agents to stabilize the PH levels (measure of acidity) at 5.5 to 5.7 thus eliminating the problem of adjusting PH levels of the water which is crucial to indoor growing.
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5.5 to 5.7 might be low according to this reference i use:
http://www.buzzgrower.com/growingproblems1.html
"
The correct pH for marijuana is 6.3 - 6.8 in soil and 5.5 - 6.1 in a hydroponic system."