How do I keep squash plants from getting powdery leaves?

Hi Susan,

Go to Google and look up "companion plants", it will tell you what to plant with your squash that will naturally repel pests. We do this all the time and have great results without any pesticides.

YOU HAVE POWDERY MILDEW. You could try spraying with a bit of baking soda in water. Leave for a few minutes and then rinse again. Do not do this in the hot sun.

Hi Susan Combine one tablespoon baking soda and one-half teaspoon of liquid, non-detergent soap with one gallon of water, and spray the mixture liberally on the plants. Mouthwash. The mouthwash you may use on a daily basis for killing the germs in your mouth can also be effective at killing powdery mildew spores.