planting under a black walnut tree?

Discussion in 'Landscape Architecture and Design' started by cntryboymc, Mar 22, 2005.

  1. cntryboymc

    cntryboymc LawnSite Member
    Posts: 193

    a customer of mine asked about planting some type of shrub or flowers beneath a large black walnut tree.i was worried about the shade,etc from the tree.any thoughts would be appreciated!
  2. sheshovel

    sheshovel LawnSite Fanatic
    Posts: 5,112

    Black Walnuts produce a poison from the roots that kills most plants beneath them.There might be a list of plants somewhere that are resistant to that but I do not know of one.
  3. grasswhacker

    grasswhacker LawnSite Gold Member
    Posts: 3,873

    I know that Yucca plants will not have any problems under a walnut tree.
  4. cntryboymc

    cntryboymc LawnSite Member
    Posts: 193

    any more thoughts?
  5. Grassmechanic

    Grassmechanic LawnSite Silver Member
    Posts: 2,697

    I've had decent luck with hostas.
  6. Coffeecraver

    Coffeecraver LawnSite Senior Member
    from VA.
    Posts: 793

    The Black Walnut puts out toxins that kill plants around it The toxin is called Juglone.

    Plants Sensitive to Juglone
    Landscape plants:

    black alder (Alnus);* azalea;
    basswood; *white birches;
    Hopa crabapple*; hackberry;
    Amur honeysuckle;
    Japanese larch;* lespedeza;
    lilac;* saucer magnolia;
    silver maple;* mountain laurel;
    loblolly pine; *red pine;
    scotch pine; *white pine;
    potentilla;* privet;
    rhododendron;* Norway spruce

    Plants Tolerant of Juglone
    Landscape plants:

    red cedar;* crabapple;
    elm;* winged euonymus;
    forsythia;* hawthorn;
    hemlock; *hickories;
    black locust;* most maples;
    oaks;* autumn olive;
    pachysandra;* pawpaw;
    persimmon;* wild rose;
    sycamore;* most viburnums;
    Virginia creeper

  7. sheshovel

    sheshovel LawnSite Fanatic
    Posts: 5,112

    Thankyou for the information Coffeecraver,I will file it away for future use,I knew if I wrote I did not know of a list you would surely come up with one!!Thanks again
  8. Garth

    Garth LawnSite Senior Member
    Posts: 382

  9. sheshovel

    sheshovel LawnSite Fanatic
    Posts: 5,112

    WOW!I'm impressed Garth very good informative info.

  10. Garth

    Garth LawnSite Senior Member
    Posts: 382

    Thanks, I worked my way through college working in botanical gardens, nurseries, orchid farms and such like. You pick up things. The chemical part really hit when I did a term-paper on randomly applified polymorphic DNA markers occuring in several varieties of Cytisus (Genista), the brooms. Apparently, California Indians used this plant to obtain "deep thought" and it was said to be mildly hallucinogenic. The chemical is related to nicotine, poisonous if consumed orally, but not if smoked. I see that I've begun blatthering so I'll stop. Sorry, I get excited when talking " plant stuff".

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