you might apply a homemade spray to control the spread of the powdery mildew fungus.
What Is Powdery Mildew?
Decant the Mixture
Pour some of the mixture into a spray bottle.
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you’re free to also mix and spray directly from a pressure sprayer if desired.
Coat all sides of the leaves and stems, and let them dry.
Reapply the mixture after rain.
The Spruce / Adrienne Legault
The best treatment for powdery mildew is to use baking soda to kill the spores.
you’re able to also use potassium bicarbonate, which also kills the mold quickly.
However, baking soda is more organic and safer to combine with other ingredients.
The Spruce / Adrienne Legault
However, they are not as strong as other ingredients.
Powdery Mildews.Colorado State University Extension
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