• slide
  • slide
  • slide
  • slide
  • slide
  • slide
  • slide
Deformed-Coneflowers.jpg

Deformed Coneflowers

My purple coneflowers look funny this summer. The petals are green and deformed.

Malformed, stunted or green flowers and excessively spindly or bushy growth is usually the result of aster yellows. This phytoplasm attacks over 300 species of plants and is often seen on daisy, dianthus, gladiolus, marigold, petunia, phlox, zinnia, snapdragon, chrysanthemum, tomato, carrot, onion, lettuce, dandelions, plantain, thistles as well as purple coneflower. This tiny disease organism is carried from one plant to another in the saliva of aster leafhoppers. There is no cure for this disease and it is best to remove and destroy infected plants. Controlling the aster leafhoppers with insecticidal soap, Neem or another eco-friendly insecticide labeled for controlling leafhoppers will help limit further spread of the disease.

Related

Upcoming Live Events
& Webinars


April 3, 2024
Garden Trends 

Franklin Public Library, Franklin, WI

April 10, 2024
FREE WEBINAR

Container Gardening Throughout the Year
Register now

April 11, 2024
FREE WEBINAR

7 Steps to Managing Water Where it Falls in Your Yard
Register now

April 17, 2024
Landscaping for Birds: 
A Gardener’s Perspective

Glendale, WI 

April 18, 2024
Be a Waterwise Gardener
Golden Rondelle Theater, Racine, WI
Register now

April 20, 2024
Pruning Hydrangeas and Other Shrubs 
Pasquesi Home & Gardens, Lake Bluff, IL

April 27, 2024
Ridges & Rivers Book Festival
Viroqua, WI

April 28, 2024
Flowering Trees and Shrubs
Ebert's Greenhouse Village, Ixonia, WI

May 1, 2024
FREE WEBINAR

Ornamental Fruits and Vegetables
Register now

May 9, 2024
FREE WEBINAR

How to Plant Your Rain Garden
Register now

WATCH ON-DEMAND WEBINARS

Learn More

Book an Appearance

Learn More

Enter to Win The Birds & Blooms' Ultimate Gardening Guide !

ENTER NOW