The solution seemed too simple, and too healthy to be
effective. If you got any of this on
your clothes or skin you would only get cleaner and suffer no ill effects,
because it is only a soap solution. The
solution is an alkaline base, which the plants thrive on and the black spot and
powdery mildew hate.
Spraying on a weekly or 10 day rotation is a must. The same is true for the toxic sprays. It is recommended that you try it in a
controlled area and see if you are happy with the results before you commit to
an all garden test.
The simple solution is made by using bar Castile soap and
water in a ration of ¼ bar to a quart of water.
The soap should dissolve completely in the water and will look a silver
milky color. Speed up the process by
shaving the soap into the water. When
the soap is dissolved you use 1/3 cup of the solution to 1 gallon of
water. You don’t have to worry about too
much spray on your plants as the dropping off also treats the ground where the
black spot lives. This should be used up
in a couple of weeks so use the extra on the soil around the plants. Castle soap can be bought in most
stores.
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