• slide
  • slide
  • slide
  • slide
  • slide
  • slide
  • slide
  • slide
  • slide

Botrytis Blight on Peonies and Roses

Brown buds that fail to open on peonies and some roses, especially the white and pink flowered varieties is usually the result of botrytis blight also known as gray mold.

This fungal disease is most common in cool and rainy as well as humid weather.  The disease attacks a variety of ornamental and edible plants and often is specific to the plant part infected.

Botrytis bud blast and flower blights can also occur on mums, dahlias, dogwood, geraniums, hydrangea, marigolds, and sunflowers.

Look for the fuzzy gray growth and small black specks on the dead tissue.

Remove infected parts and place in a paper bag for disposal. Don’t compost it as this can spread the disease.  And only clean up during dry weather as moisture helps spread the blight.

Ongoing sanitation, fall clean up and better weather is usually enough to keep this disease under control

A bit more information:  Phytophthora blight is another common disease of peonies.  Both blights cause purplish black spots on the leaves and stems of peonies.  Fall clean up and drier spring weather is usually enough to keep both diseases under control.

Upcoming Appearances


May 13, 2021
Planting Your Rain Garden
Webinar

May 16, 2021
Perennials for Challenging
Growing Conditions

Webinar

May 21-23, 2021
NARI Milwaukee Spring Home Improvement Show
In-person Appearance

June 3, 2021
Creative Container Gardening
Webinar

June 9, 2021
Sustainable Lawn & Landscape Care
Webinar

June 10, 2021
Gardening During the Summer Months
Webinar

Register today! Plus, watch Melinda's past webinars ON DEMAND
for a limited time.

Learn More

Book an Appearance

Learn More

Win Plantskydd Animal Repellent package

ENTER NOW