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Walnut Toxicity 1

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Walnut Toxicity


Black walnut roots release a toxin called Juglose that prevents many plants from growing. Plants that are susceptible to the toxicity and usually die slowly (by gradually wilting). Here are some perennials that are not susceptible:

PERENNIAL PLANTS NOT AFFECTED


The following is a list of herbaceous perennial plants that appear NOT affected by the toxicity released by walnut roots.

Ajuga reptans
(bugle weed)
Monarda didyma
(Bee balm)
Alcea rosea
(Hollyhock)
Monarda fistulosa
(Wild bergamot)
Asarum europeaeum
(European wild ginger)
Oenothera frutcosa
(Sundrops)
Osmunda cinnamomea
(Cinnamon fern)
Astilbe
Phlox paniculata
(Summer phlox)
Camnpanula latifolia
(Bellflower)
Polemonium reptans
(Jacob's ladder)
Chyrsanthemums
Polygonatum commutatum
Dryopteris cristata
(Crested Wood fern)
Primula X polyantha
Polyanthus Galium
Galium odoratum
(Sweet woodruff)
Primrose
Geranium robertianum
(herb Robert)
Pulmonaria
(Lungwort)
Geranium sanguineum
(Cranesbill)
Sanguinaria canadensis
(Bloodroot)
Helianthus tuberosus
Jerusalem Sanguinaria canadaensis
Hemerocallis
(Daylily)
Sedum acre
(Gold moss)
Heuchera X brizoides
Stachys byzantina
(Lamb's Ear)
Hieracium aurantiacum
Orange Tradescantia virginiana
(Spiderwort)
Trillium cernuum
(Nodding trillium)
Hosta fortunei
Trillium grandiflorum
Hosta lancifolia
Hosta marginata
Uvularia grandiflora
(Big merrybells)
Hydrophyllum virginianum
(VirginiaViola canadensis)
Iris sibirca
(Siberian Iris)


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last updated September 18, 1996
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