What Plants Will Grow Near Black Walnut Trees?
The black walnut (Juglans nigra) is a highly valued, North American hardwood. The species is very sensitive to soil conditions and grows slowly on poor sites. According to Ohio State University, the roots of the black walnut produce a toxin known as juglone (5-hydroxy-alphanapthaquinone). On a mature tree, the radius of toxicity can extend up to 80 feet from the trunk. Does this Spark an idea?
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Fruits
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Cherry trees can grow near a black walnut tree. The Horticulture Department at the University of Wisconsin-Madison observed species of peach, nectarine, cherry and black raspberry to be tolerant of black walnut.
Vegetables
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Carrots and a few other species of vegetables are capable of growing near black walnut trees. The Department of Horticulture at Purdue University have found that species of lima bean, beet, carrot and squash can survive near the root zone.
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Annual Flowers
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Most annuals fail to thrive near a black walnut. There are few annuals that will survive near a black walnut. A select species of zinnia, begonia, morning glory, pansy and marigold are capable of growth.
Herbaceous Perennials
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Extremely hearty, a hosta is able to grow under a black walnut tree. Species of hosta, daylily, violet and many other perennials will thrive growing near a black walnut.
Trees and Shrubs
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Oaks can be found in close proximity to black walnut trees. Trees associated with the black walnut include species of oaks, maples and hickories. Shrubs such as species arborvitae and viburnum can also grow within the root zone.
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References
Resources
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