Ornamental grasses and black walnut trees

Asked July 4, 2015, 4:17 PM EDT

I am having trouble locating a reference re: ornamental grasses that will grow under or near a black walnut tree. I'd like to use fountain grass or maiden grass. Moving the tree is not an option.

Oakland County Michigan black walnut tree juglone

1 Response

Both of these grasses are listed as tolerant of juglone, the substance that many plants can't tolerate. Plants within 50 to 100 feet of a mature black walnut will be affected by juglone. The other factors to consider are competition for water and the amount of shade the tree is creating.

Other grasses tolerant of walnut are blue oat grass, blue fescue, 'Karl Foerster' feather reed grass, little blue stem, and switch grass.

Click on these links to find plants that tolerate walnut:

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