Gray Mold
Botrytis paeoniae

• Flower buds turn black to brown and fail to open
• New shoots turn black, wilt and die when they emerge in the spring
• Stem infections turn brown or black and often have a target spot appearance
• Leaves and petals have black to brown irregular spots, and may turn completely black
• All infected plant parts produce fluffy gray spores with moisture
• Most common in cool, wet weather
• More information on Gray Mold