• slide
  • slide
  • slide
  • slide
  • slide
  • slide
  • slide
Leaves-of-Hollyhocks-Discolored-with-Holes-THUMB.jpg

Leaves of Hollyhocks Discolored with Holes

I've heard there is an old-fashioned remedy for the holes and discoloration that hollyhocks get. Do you know what it is or have any other tips to offer?

The unsightly leaves are caused by sawflies, caterpillar-like insects, eating holes and rust, a fungal disease, discoloring the leaves.  Reduce disease problems by growing hollyhocks in full sun with good air circulation.  Remove nearby mallow weeds that are also susceptible and can increase the risk of the disease.  A thorough fall clean up and good sanitation throughout the season may help keep this disease under control.  Fortunately neither the insect nor the disease kill the plant just reduce its beauty.  Try masking the unsightly foliage with nearby plants.  I use daylilies, ornamental grasses and coneflowers in front of hollyhocks to hide the pest damaged leaves.  This is less work for you and kinder to the environment.   Insecticides labeled for sawflies and fungicides labeled for controlling rust hollyhocks can provide relief.  A relatively new plant derived pesticide, Neem, is effective at controlling both the sawflies and the rust disease.  Select a formulation designed for both purposes and labeled for use on hollyhocks.  And as always read and follow all label directions carefully.  

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 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 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
Pasquesi Home & Gardens
The Why and How of Pruning Hydrangeas and Other Shrubs
Lake Bluff, IL

WATCH ON-DEMAND WEBINARS

Learn More

Book an Appearance

Learn More

Enter to win Longfield Gardens bulbs valued at $157.00 !

ENTER NOW