Sweet Caroline and Illusion ® Sweet Potato Vine (Ipomoea spp) Rainbow Rhythm ™ Daylily (Hemerocallis spp) Lemon Drop ® Evening Primrose (Oenothera spp) Use care in making your decisions about gardening beneath a black walnut, as this native tree may benefit your local ecosystem more than the garden you imagine replacing it with.Īmazing Daisies ™ Shasta Daisy (Leucanthemum superbum) Remember the black walnut is a native tree that can provide shade and atmosphere while being drought tolerant and relatively pest-free. Remember, every garden situation is different so start slowly and add plants as you see success. Many plants can tolerate being near a black walnut tree, including the list of Proven Winners ® plants shown below. The bad news is that tomatoes will not grow near black walnuts, so your dreams of a salsa garden might be compost for now….Limb branches up high to allow enough light in to grow plants below. Black walnut trees can create heavy shade.Learn which plants can tolerate being near black walnut trees and which cannot.The roots are also toxic and juglone can persist in dead wood for years even after the tree is removed. Remove all fallen black walnut leaves, stems and walnuts since they also contain the chemical.The drip line of a black walnut (everything under the canopy from trunk to farthest branch tips) is the hardest place to grow plants because the tree concentrates the chemical juglone under its own canopy.But all is not lost! You can grow plants near and even under a black walnut tree if you select carefully. That’s the whole point from the black walnut’s point of view by releasing its own natural herbicide, it has fewer plants to compete with.īlack walnut trees are native to most of the Central and Eastern United States from Florida north to Quebec and west to Utah, so you’ll find them growing in a lot of gardens in North America. For anyone who worries about this tree affecting their gardening, there is even a Black Walnut Society to help you learn more about gardening around the dreaded black walnut! Black walnut trees have a well-deserved reputation for making life difficult for gardeners because they release a toxic compound called juglone, which can adversely affect many kinds of plants. For many gardeners across the United States and Canada, the words “black walnut tree” can signal severe depression.
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