Re: Anybody add gypsum to their soil for calcium?
My partner is a contractor. When he has left over drywall pieces I just spread them around and mulch on top so that they gradually break down. Covers weeds in the short term and perhaps provides calcium in the long term. Can't really tell if it helps or hurts, other than my bananas on my new lot being clearly calcium deficient until I used dolomite lime. It's been less than a year though and I imagine the drywall hasn't broken down enough to be useful yet.
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