OldMedUser
Well-Known Member
I have used both the 20-8-8 version and the 9-16-16 version. it is a bit too strong for the plants in most cases unless there is a serious deficiency, except there is one problem with both..for some reason..pro-mix has decided to leave out magnesium and sulfur altogether in both. Definitely someone fell asleep when creating this fertilizer..missing core elements!
I didn't even know that ProMix made fertilizers. I just love their media for growing in.