Re: copperas/Acidifying soil (was Re: Microsoft alert (Humor))

> There is no copper in "Copperas" as available from Hi-Yield.  It is
> ferrous sulfate.  That is iron chemically bound to sulfur and oxygen
> molecules as a salt of iron (like iron "rust").  It is 11% sulfur and
> 19% iron.  It will acidify the soil as well as add iron to it to help
> chlorosis.
> I buy it in 15 pound bags. My soil is very alkaline--pH 8 or so.  That's
> why we cannot grow Japanese Iris here.  But I have!  Got them from
> Ensata Gardens, too.

NB:  aluminum (aluminium for you Canadians) sulfate is a less expensive
but less "nutritious" form of sulfate.
-- 
Amy Moseley Rupp
amyr@mpd.tandem.com, Austin, TX, zone 8b
Jill O. *Trades
Mistress O. {}
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