Even though I'm concentrating on growing vegetables right now, I still have one little patch of flowers. The bed was used as a parking space so I didn't think it wise to grow food there. Anyway, I have some pink scabiosa which is a perennial in CA. The largest of the tree plants has developed powdery mildew. I know this disease is catchy and I'm concerned because close by I've planted peas along the fence. (15 feet of sugar snap peas - three different varieties, 5 feet of snow peas, and five feet of shell peas.) I 'd like to keep the scabiosa if I can because the pink ones are hard to come by. These were bought at a Mom-and-Pop nusery that has now gone out of business. (Actually, both mom and pop were deceased, and it was the daughter that was trying valiently to keep the family business going.) What can I do? I have been dousing the plant with a baking soda solution for three days now, but I don't see any improvement.

Thanks,

Sara