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Plants Resistant to Walnut Toxicity

          Black walnut trees produce a toxin (juglone) which kills or stunts plants near them.  Juglone is expelled through the roots stems, leaves, and nuts.  Gardening near Walnut trees can be more difficult, but in no way is it impossible.

            Cleaning any tree debris underneath the tree can be one easy way to limit the exposure to juglone to plants which are outside the drip line of the tree.  Do not use any walnut tree debris for mulching or amending your soil as you may contaminate the surrounding area.

            Sometimes you can place a wood, plastic, or concrete barrier to separate the trees roots from the roots of the plants you wish to plant near a walnut.  Barriers can also keep tree roots away from larger garden spaces.

            An ounce of prevention is worth a pound of cure when it comes to creating a garden near walnuts.  Here is a list of plants which are less susceptible to juglone and can take some of the trial and error out of your garden.

Perennials:

●Ajuga reptans

     Ajuga/Bugleweed

 

●Alcea rosea

     Hollyhock

 

●Astilbe sp.             Chocolate Chip Ajuga

     Astilbes

 

●Campanula latifolia

     Bellflower

 

●Chrysanthemum sp.

     Hardy Mums

 

●Gallium odoratum

     Sweet Woodruff

 

●Geranium sanguineum

     Bloody Cranesbill

 

●Helianthus tuberosus

     Jerusalem Artichoke

 

●Hemerocallis

     Daylily

 

●Hosta

     Hosta

                                   Albo Marginata Hosta

●Iris siberica

     Siberian Iris

 

●Monarda didyma

     Bee Balm

 

●Oenothera fruticosa

     Sundrops

 

●Onoclea sensibilis

     Sensitive Fern

 

●Osmunda cinnamomea

     Cinnamon Fern

 

●Phlox paniculata

     Garden Phlox

 

●Polemonium commutatum

     Jacob's Ladder

 

●Primula x polyantha

    Polycanthus Primrose

 

●Pulmonaria

     Lungwort

 

●Sanguinaria canadensis

     Bloodroot

 

●Sedum acre

     Goldmoss

 

●Sedum specable

     Sedum

                                              Starfire Phlox

●Stachys byzantine

     Lamb's Ear

 

●Tradescantia virginiana

     Spiderwort

 

●Trillium grandiflora

     Trillium

 

●Viola

     Violets

 

 

Vegetables and Fruits:

 

●Daucus carota

     Carrots

 

●Phaseolus vulgaris

     Beans

 

●Rubus occidentalis

     Black Raspberry

 

●Zea mays

     Corn

Trees:

 

Acer Palmatum

     Japanese Maple

 

●Acer palmatum var. dissectum

     Cutleaf Japanese Maple

 

●Catalpa bignonoides

     Common Catalpa

 

●Cercis canadensis

     Redbud

 

●Cydonia oblonga

     Quince

                            Red Japanese Maple

●Juniperus virginiana

     Red Cedar

 

●Tsuga canadensis

     Canadian Hemlock

 

 

 

Shrubs:

 

●Clematis

     Clematis

 

●Forsythia

     Forsythia

                                      Karl Saxe Forsythia

●Hibiscus syriacus

     Rose of Sharon

 

●Lonicera tatarica

     Tartarian Honeysuckle

 

●Parthenocissus quinquifolia

     Virginia Creeper

 

●Rhododendron 'Exbury Hybrid'

     Exbury hybrid Azalea

 

 

 

Annuals:

 

●Begonia sp

     Begonias

 

●Calendula sp

     Calendulas

 

●Ipomoea sp

     Morning Glory

 

●Viola cornuta

     Horned violet

 

●Viola x wittrockiana

     Pansy

 

 

Bulbs:

 

●Crocus sp

     Crocus

 

●Muscari sp

     Grape Hyacinth

 

●Narcissus

     Daffodil

 

●Scilla siberica

     Blue Squill

 

●Tulipa

     Tulip

 

 

 

Turf:

 

●Poa pratersis

     Kentucky Bluegrass

 

 

 

 



 

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