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Kill Powdery Mildew Fast With This D.I.Y. Recipe

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This simple homemade recipe kills powdery mildew safely, without harming your plants or introducing chemicals into your garden.

Powdery mildew is a fungal disease that often impacts cucumbers, squash, gourds, pumpkins, and watermelons. It appears as white spots or splotches on the leaves, resembling a dusting of flour. It is particularly a problem during wet periods, or on drought-stricken plants, and can kill your plants if it gets too bad.

While some fungicides are effective against powdery mildew, if you’re gardening organically you won’t want to use a chemical agent.

Luckily, there is a homemade cure that works very well against most cases of powdery mildew, and may also work for other fungal diseases in the garden, such as black spot on roses or grapes.

This recipe is safe, non-toxic, and easy to make using common household items you probably already have on hand in your kitchen.

Here’s how to make it:

Homemade Natural Garden Fungicide Recipe


4 Level teaspoons or 1 1/3 tablespoons of Baking Soda
1 teaspoon of Mild Liquid Soap (castile or all-natural dishwashing soap work well; be sure to choose one that is biodegradable with no phosphates)
1 gallon of Water


  • Mix all ingredients thoroughly and keep agitated while using.  Then spray plants.
  • Spray all leaves thoroughly, until the solution begins to run off.  Spray the top and bottom of affected leaves, and spray all of the small new leaves, even if they don’t appear to have the fungus yet.
  • Use weekly until problem is resolved.
Recipe Source: The Grow Network

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