Melinda's Garden Moment: Botrytis Blight on Peonies and Roses
buds that fail to open on peonies and some roses, especially the white and pink
flowered varieties are likely the result of Botrytis Blight also known as Gray
This fungal disease is most common in
cool, rainy weather as well as humid weather. The
disease attacks a variety of ornamental and edible plants and often is specific
to the plant part infected.
bud blast and flower blights we see here may also occur on mums, dahlias,
dogwood, geraniums, hydrangea, marigolds, and sunflowers.
for the fuzzy gray growth and small black specs on the dead tissue.
infected parts and place in a paper bag for disposal. And don't compost. Only clean up during dry weather as moisture
helps spread the blight.
sanitation, fall clean up and better weather is usually enough to keep this
disease under control.
Several other fungal diseases can cause spots on the leaves and stems of
peonies. These spots can be round and circular
or irregular in shape. Stem cankers,
sunken discolored areas, can cause twisting and even death of the stem. Sanitation is usually enough to manage these
diseases on healthy established plants.