• slide
  • slide
  • slide
  • slide
  • slide
  • slide
  • slide
  • slide
Gardening-Beneath-a-Black-Walnut.jpg

Gardening Beneath a Black Walnut

Will butterfly bush, lilac, dogwood, or other flowering trees and shrubs grow under a black walnut tree. The tree branches are within 12 feet of the proposed planting bed.

As you know, black walnut roots, leaves and bark contain juglone. This substance is toxic to many plants. There is limited research on plants that tolerate the juglone substance. The best approach is to keep the garden at least 50 preferably 80 feet away from the tree. The following list of flowering trees and shrubs have been observed growing under black walnut trees. Redbud (select the Columbus or Minnesota strain for increased hardiness), Koreanspice viburnum, other species of viburnum, weeping forsythia and Rose of Sharon. Some varieties of the following perennials will also survive under a black walnut. Bugleweed, astilbe, Dutchman's breeches, cranesbill geranium, hosta, daylilies, Siberian iris, sundrops (Oenethera), lungwort, trillium, lamb's ear and tulips. For a more complete listing see Purdue University's Black Walnut Toxicity bulletin.

Related

Upcoming Appearances


Jan. 29, 2022
WCBA's Home Building &
Remodeling Expo

West Bend, WI
(in-person event)

Feb. 2, 2022
Small Space Gardening
(webinar)

Feb. 11-13, 2022
PBS Wisconsin
Garden & Landscape EXPO

Madison, WI
(in-person event)

Feb. 18-20, 2022
NARI Milwaukee
Spring Home Improvement Show

Milwaukee, WI
(in-person event)

Feb. 23, 2022
Dahlias - Proven Performers!
(webinar)

March 1, 2022
Michigan Green Industry Assn.
Annual Tradeshow & Convention

Novi, MI
(in-person event)

March 5-6, 2022
Maryland Home & Garden Show
Lutherville-Timonium, MD
(in-person event)

​​​​​​​March 26-27, 2022
​​​​​​​REALTORS Home & Garden Show
West Allis, WI
(in-person event)

Watch Melinda's past webinars ON DEMAND

Learn More

Book an Appearance

Learn More

Enter to Win
Your Best Garden & Landscape in 6 Lessons DVD set

ENTER NOW