Can I compost plants with powdery mildew?


Should be no problem at all. Powdery mildews only survive on a living host and the composting process will kill the fungus as well as the plants. Not many plant pathogens survive the process. There is some evidence that plants with Verticillium wilt might survive and be a problem when used as mulch. Check out these resources in the PNW Plant Disease Management Handbook:

Was this page helpful?

Related Content from OSU Extension

Have a question? Ask Extension!

Ask Extension is a way for you to get answers from the Oregon State University Extension Service. We have experts in family and health, community development, food and agriculture, coastal issues, forestry, programs for young people, and gardening.