Walnut Toxicity

beesntreesMay 11, 2009

We would like to plant a Magnolia but will have Walnut trees near it. How tolerant are Magnolias of Juglone ?


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Recently I attended a gardening seminar and I learned that the walnut trees are not actually toxic. The Juglone is actually just the walnut trees way of keeping the competition down as it inhibits the growth of what is near it. So perhaps your Magnolia will just grow more slowly.

    Bookmark   June 1, 2009 at 8:19AM
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tsugajunkie z5 SE WI

"...it inhibits the growth of what is near it..."

Except, like it the case of tomatoes (and others), it ihibits them to the point of virtually instant death. ;-)
Seems like symantics- if it kills something, its toxic to that plant.


    Bookmark   June 5, 2009 at 3:45AM
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greensparty(Z5 MI)

Juglone can inhibit some plants and not others. Growing up we had a group of walnuts with a lot of bulbs growing in the middle of them....it really depends on the plant.

    Bookmark   June 13, 2009 at 7:26PM
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