I have powdery mildew on my sweetpeas and there are a lot of other plants nearby . I treated it with a fungicidal spray but then read of an alternative method using baking soda . Has anyone tried this and if so does it work ? I like the idea as I don't like using sprays etc . I also read that p. mildew hates water so would like to hear your comments or any other ideas on how to get rid of it.
Thanks , Jean.