Re: Re: CULT: pH
- Subject: Re: [iris-talk] Re: CULT: pH
- From: o*@aol.com
- Date: Tue, 26 Mar 2002 20:42:13 EST
Actually I was addressing the growing conditions within zones 7/8 as they
relate to the influence soil pH has on iris growth and bloom production. e.g.
the Potassium (K) I mentioned as a tidbit is readily available to the plant
at pH's above 6 and to 10 but falls off dramatically below pH 6. Potassium
does more than influence color. It imparts increased vigor and disease
resistance. It also stiffens the stalk, improves color saturation and is
essential to formation and traslocation of starches, sugars and oils within
the plant. Manganese (Mn) one of the essential micro nutrients, on the other
hand, is most available to the plant at pH levels from 4.5 to 7 but the
availability begins falling after pH 7 and does so dramaticly after a pH
level of 8 is reached. Mn increases the availability of calcium (which
promotes root hair formation and vigor), aids in the synthesis of chlorrphyll
(roughly the sugars mentioned above).
The short of all this it is entirely possible to have good vigor and bad
bloom in one garden and poor vigor good bloom in another, bad vigor bad bloom
in another, good vigor good bloom in another. All with the same iris and due
only to variations in pH. Hope this clears up my statement.
I mighta woulda' tried to write this in Southern but it jist weren't possible
to do. Them words is too hard to spell in my native language.
Bill Burleson
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