Quote Originally Posted by Opie Yutts
Just a thought. I know 6.5 PH is about right for soil (I like 6.6), but this Cannabis.com Forums Message Boards - Medical Marijuana, Cannabis Club, Dispensary, News shows that 6.5 may make it hard for iron uptake. Any PH may cause deficiency in some chemical. Perhaps a foliar feeding of Spray N Grow? Certainly couldn't hurt.
meh..

I've like this chart. I feel it's a more accurate depiction of what happens as the ph rises or drops.

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