• slide
  • slide
  • slide
  • slide
  • slide
  • slide
  • slide
Planting-for-Screening-Near-Black-Walnut.jpg

Planting for Screening Near Black Walnut

I have black walnut trees along my lot lines. What other plants & bushes will grow near these trees? I need to plant more coverage along the lot line.

Many gardeners struggle with this problem and I am continually asked for recommendations. As you know, all parts of the black walnut tree including the roots, fruits and leaves contain juglone. This is toxic to many plants. When susceptible plants come in contact with the juglone the leaves yellow and wilt. The plants may be stunted or eventually die.

Some plants like bluegrass are not sensitive while others like petunia are. Several shrubs including forsythia, most viburnums, rose of Sharon, wild rose, arborvitae, red cedar (Juniperus virginiana) and hemlock tolerate the black walnuts and would help provide some screening along your lot line.

Perennial flowers such as bee balm, Shasta daisy, most ornamental grasses, ferns, astilbe, wild ginger, Solomon's seal, Siberian iris, Virginia bluebells, some peonies, phlox and some daylilies could be used for seasonal color and texture.

Pansies, pot marigold (Calendula), and zinnias are a few of the annuals that seem to tolerate the juglone.

Unfortunately there is not a complete list of all plants and their susceptibility or resistance to this substance. Take a look at Purdue University’s Black Walnut Toxicity bulletin for more complete listings of black walnut susceptible and resistant plants.

If a plant you are interested in trying is not listed, as resistant or susceptible, you may want to experiment. Plant one or two under the black walnut tree’s canopy where the concentration of juglone is the greatest. If they survive you may want to use more of them to dress up your juglone zone. Whatever black walnut resistant plants you select, be sure they can tolerate the light, soil and growing conditions in the area and will have plenty of space to reach their full size.

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