Re: [CH] gypsum application

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It won't affect them at all.  Gypsum is relatively harmless even in high doses.  
Dave Andersons' recommended rate from his books & my app rate were 
different by an order of 10x!  It works on the soil, not the plants.  Application 
rates depend on how much clay content is in your soil.  On my heavy clay soil 
I used about a pound per 10 sq ft.  Your nursery supplier will be able to tell 
you & the directions & are usually on the bag as well.  Be careful with the 
peat moss though- clay + fiber = adobe!  Be patient with the gypsum.  You 
won't likely see results for a couple of years.

-Jim Campbell
http://www.wildpepper.com

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