The black walnut tree diagram ( Juglans nigra L. ) raise a substance called juglone that is harmful to sealed species of industrial plant and tree . Plants raw to juglone hurt from wilting , yellowing , stunt ontogeny and eventual end when planted within the 50- to 80 - foot root zone of the tree , according to University of Wisconsin Extension . There are a number of plants that have a high tolerance for juglone , enable them to survive when planted near the black walnut tree .

Vegetables and Fruits

implant a garden near a dim walnut tree is potential if you choose industrial plant that are extremely resistant to the chemical juglone . Squash , carrots , beets and sweet maize all thrive when planted in gardens located near black walnut tree trees . According to Purdue University Cooperative Extension , noodle plants , including lima and snap , onion plant , and parsnips suffer no ill - effects from exposure to juglone and will produce a successful and healthy craw while produce in the law of proximity of the dark walnut tree tree . Melons , black raspberry bushes and idle grapes are not sensitive to juglone and flourish when planted close to pitch-black walnut tree trees .

Trees and Shrubs

Placing tree and shrubs near the black walnut is successfully done by choose salmagundi that are resistant to the chemical juglone . Crabapple , cherry , elm , locust tree and maple trees will grow alongside the black walnut . The University of Wisconsin states that Canadian hemlock , black locust tree and pagoda dogwood trees are all highly tolerant of juglone and will suffer no harmful effects when plant close to the dim walnut Sir Herbert Beerbohm Tree , says . Azalea , mountain laurel , glow bush and rosebush - of - sharon are shrubs that wave when planted within the toxic radius of the black walnut ’s root zona .

Flowers

Annual flowers extremely tolerant of juglone include pansies , impatiens , begonias , zinnias , morning glory and pot marigolds . Perennials such as althea , daylilly , hosta , bee balm and horned violet are tolerant to juglone and flourish in flower beds or garden that are in close proximity to the tree ’s ascendent zona . Darwin tulips , Narcissus pseudonarcissus , hyacinthus and crocus bulbs are not sore to juglone and have been observed grow under , or in orbit close to , the dark walnut , say Ohio University Extension .

Field Crops

sure field craw are extremely resistant to juglone and will survive when planted near or under a black walnut tree tree . White clover , soybeans , wheat and timothy demonstrate no response to the chemical juglone when planted around dim walnut Sir Herbert Beerbohm Tree , consort to University of Wisconsin Extension . Red top sens and orchard grass flourish when place within 50 pes of the black walnut tree diagram . Kentucky blue eatage and meadow fescue are also known to be highly tolerant of juglone and will arise around blackened walnut tree as well .

References

…