• 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


Feb. 28, 2024
FREE WEBINAR

Create a Beautiful Landscape Free of Invasive Plants in Wisconsin Gardens
Register now

Feb. 29, 2024
FREE WEBINAR

How to Plan Your Rain Garden
Register now

March 6, 2024
FREE WEBINAR

Growing Summer Bulbs in Containers
Register now

March 7, 2024
Help Your Landscape Thrive After Winter

Wauwatosa Public Library, Wauwatosa, WI
Register now

March 13, 2024
FREE WEBINAR

Hydrangea Selection, Pruning & Care
Register now

March 14, 2024
FREE WEBINAR

How to Select Rain Garden Plants
Register now

March 20, 2024
FREE WEBINAR

Maximize the Beauty and Enjoyment
in Any Small Space
Register now

March 23, 2024

REALTORS Home & Garden Show
West Allis, WI

March 27, 2024
FREE WEBINAR

How to Start a Garden for Beginners
Register now

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 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

WATCH ON-DEMAND WEBINARS

Learn More

Book an Appearance

Learn More

Enter to win Longfield Gardens bulbs valued at $157.00 !

ENTER NOW