Mildew on Peonies

Question

In spite of fungicides, I have problems with powdery mildew on my peonies after blooming. They are planted in full sun with ample space between plants. Can I thin the stems out to promote more air circulation without harming the plants? They are full and start out healthy and don’t need dividing yet.

Answer 1

It will not hurt to thin out the plant, but do so now in spring. These articles will help with the powdery mildew: https://www.gardeningknowhow.com/plant-problems/disease/get-the-cure-for-powdery-mildew.htm, https://www.gardeningknowhow.com/plant-problems/disease/powdery-mildew-homemade-and-organic-remedies.htm