bindweed killer
>That's the way it's sold here, too. Years ago I used it, then stopped
>because someone told me it raised the pH, and ours was already over 7.0.
>After this fellow told me about his experience, I learned that it does have
>some sulfur in it, and that should neutralize any rise in pH. But imagine
>the caliche hardpan under the surface, nutrients (including the sulfur)
>falling to that level and concentrating there, along with the roots of the
>bindweed...do folks in acid soil territory have bindweed? Thanks, Margaret
Most of the following data is from "Weed Control Without Poisons"
Bindweed (Convolvulus sepium) is most often found on soils that have
improper decay properties. In other words, organic matter can not decay
properly for any number of reasons. Other soils with excesses of heavy
metal accumulations also support bindweed.
Bindweed also flourishes in soils with low humus counts (possibly related
to improper decay properties) such as sand and heavy clay soils. Low
measurements of calcium (hence the gypsum), phosphorus, potassium and pH
also promote its growth.
From a cultural standpoint this means that soils with compaction,
sedimentation or improper tillage (digging in wet soils etc.) can create
this soil condition.
Correct these and the bindweed will become less of a problem.
The short story is that improving the decay properties of a soil is a
matter of balancing pH and aeration.
As in most gardening - get the soil right and the weeds/plants take care of
themselves.
Doug
Doug Green,
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