• slide
  • slide
  • slide
  • slide
  • slide
  • slide
  • slide

Gardening Under a Black Walnut Tree

Part of the fun or for some the frustration of gardening is overcoming challenges and one big challenge for many gardeners is planting under a black walnut tree. All parts of this tree contain a toxic substance called juglone. One solution for gardeners is to grow juglone tolerant plants.

Some gardeners have the added challenge of shade. In this case you may want to include several varieties of coral bells for their interesting shaped and colored foliage. The variegated leaves of hosta and lungwort also help brighten the shade. For height you may want to include variegated Solomon's seal. Daring gardeners may decide to try their luck with Canadian ginger. Try using only a few plants to see if it will tolerate the juglone. Adding golden moneywort provides a nice contrast to the ginger.

Dont forget to mix in a few bulbs like squills, snowdrops and winter aconite for early spring color.

A bit more information: Minimize your frustration by growing susceptible plants at least 50 feet away from your black walnut tree. The further you move away from the tree the lesser the concentration of the toxic juglone. Or create a juglone-free raised bed. Cover the soil and line the sides of the raised bed with water permeable weed barrier fabric. The fabric can help slow or prevent the invasion of black walnut roots into the raised bed garden. Cover the barrier as you fill the bed with fresh topsoil free of juglone. And if you decide to remove the tree, be patient. The juglone remains in the soil until the roots, nuts and leaves totally decompose.

Upcoming Live Events
& Webinars


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