Re: JI Fertilizer Conflict
- Subject: Re: [iris-talk] JI Fertilizer Conflict
- From: e*@aol.com
- Date: Wed, 11 Oct 2000 08:19:19 EDT
In a message dated 10/7/00 5:31:06 AM Eastern Daylight Time,
nye@mail.fidalgo.net writes:
<< Why are fertilizers with Calcium in bonemeal and Calcium carbonate in
the rock phosphates recommended for the fertilization of Japanese Iris,
if lime and/or the Calcium in bonemeal are said to be fatal to Japanese
Iris? >>
They certainly can be fatal to JI. I know of no authority that recommends
superphosphate or bonemeal or general flower fertilizer containing them for
JI; none of the azalea and rhodo fertilizers should be a problem.
By the way, most all plants including JI are dependent on calcium. It is not
calcium that is the problem, it is the carbonate (lime). Calcium sulphate
(gypsum) and calcium nitrate will not harm JI.
Superphosphate should rarely be used anywhere - it ties up iron and can cause
lots of problems. Seldom does a soil need phosphorus
You should know that mushroom compost has lime in it. Be very careful when
using potting products containing peat moss: sometimes lime is added by the
manufacturer to neutralize it.
Bob Bauer at Ensata Gardens
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