Milk for powdery mildew
From personal experience over the past years this works to control PM.
Milk Spray Recipe
1 part milk (organic if gardening organically) to 9-10 parts water.
Method:
Mix the milk and water together in a spray bottle. I use this glass spray bottle here but you can also use a plastic spray bottle or whatever you already have.
Spray the milk solution wherever you can see powdery mildew on the affected plant every 7 days.
Spray the plants during sunlight hours, preferably in the morning. Sunlight is likely to be a contributing factor to the effectiveness of this spray (more on why below).
This milk spray can be used as a preventative measure against powdery mildew. Spray plants at a frequency of every 7-14 days.
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