Green Industry Resources
Hort Update- Seasonal Information for the Green Industry
I had Botrytis in my peonies last year. What can I do to protect them this year?
The best thing you can do is remove all the dead plant material from last year and throw it away. Then use good cultural practices such as making sure there is plenty of air circulation and avoid overhead watering to avoid infection. If necessary, you could use a protective fungicide for additional control.