Rumor has it

Keighan

Well-Known Member
That you can use gypsum as natural cal-mag? Anybody have any experience? Read it on a couple other forums figured I'd ask RIU there opinion.
 

Keighan

Well-Known Member
That's what I thought, at least what I thought I thought I've used it as an additive in oyster mushroom cultivation.
 

cannakis

Well-Known Member
Though I Do like to use Land Plaster/Gypsum though... And I use Lime as well and that will give you some Magnesium.

Any natural magnesium sources?!
 
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