Plants Observed Growing Under or Near Black Walnut
Trees
- Japanese Maples, Acer palmatum and its cultivars
- Southern Catalpa, Catalpa bignonioides
- Eastern Redbud, Cercis canadensis
- Canadian Hemlock, Tsuga canadensis
Vines and Shrubs
- Clematis ‘Red Cardinal’
- February Daphne, Daphne mezereum
- Euonymus species
- Weeping Forsythia, Forsythia suspense
- Rose of Sharon, Hibiscus syriacus
- Tartarian Honeysuckle, Lonicera tatarica, and most other Lonicera species
- Virginia Creeper, Parthenocissus quinquefolia
- **Pinxterbloom, Rhododendron periclymenoides
- **’Gilbraltar’ and ‘Balzac’, Rhododendron Exbury hybrids
- Multiflora Rose, Rosa multiflora
- Black Raspberry, Rubus occidentalis
- Arborvitaes, Thuja species
- **Koreanspice Viburnum, Viburnum carlesii, and most other Viburnum species
Annuals
- Pot-marigold, Calendula officianalis ‘Nonstop’
- Begonia, fibrous cultivars
- Morning Glory, Ipomoea ‘Heavenly Blue’
- Pansy Viola
- Zinnia species
Vegetables
- Squashes, Melons, Beans, Carrots, Corn
Fruit Trees
- Peach, Nectarine, Cherry, Plum
- Prunus species Pear-Pyrus species
Herbaceous Perennials
- Bugleweed, Ajuga reptans
- Hollyhock, Alcea rosea
- American Wood Anemone, Anemone quinquefolia
- Jack-in-the-Pulpit, Arisaema triphyllum
- European Wild Ginger, Asarum europaeum
- Astillbe species
- Bellflower, Campunula latifolia
- **Chrysanthemum species (some)
- Glory-of-the-Snow, Chionodoxa luciliae
- Spring Beauty, Claytonia virginica
- Crocus species
- Dutchman’s Breeches, Dicentra cucullaria
- Leopard’s-Bane, Doronicum species
- Crested Wood Fern, Dryopteris cristata
- Spanish Bluebell, Endymion hispanicus
- Winter Aconite, Eranthis hyemalis
- Snowdrop, Galanthus nivalis
- Sweet Woodruff, Galium odoratum
- Herb Robert, Geranium robertianum
- Cranesbill, Geranium sanguineum
- Grasses (most) Gramineae family
- Jerusalem Artichoke, Helianthus tuberosus
- Common Daylily, Hemerocallis ‘Pluie de Feu’
- Coral Bells, Heuchera x brizoides
- Orange Hawkweed, Hieracium aurantiacum
- Plantain-lily, Hosta fortunei ‘Glauca’
- Hosta lancifolia
- Hosta marginata
- Hosta undulata ‘Variegata’
- Common Hyacinth,Hyacinthus Orientalis ‘City of Harlem’
- Virginia Waterleaf, Hydrophyllum virginianum
- Siberian Iris, Iris sibirica
- Balm, Monarda didyma
- Wild Bergamot, fistulosa
- Grape Hyacinth, Muscari botryoides
- Sweet Cicely, Myrrhis odorata ‘Yellow Cheerfulness’, ‘Geranium’, ‘Tete a Tete,’ ‘Sundial’, February Gold’
- Sundrops, Oenothera fruticosa
- Sensitive Fern, Onoclea sensibilis
- Cinnamon Fern, Osmunda cinnamomea
- Peony, **Paeonia species (some)
- Summer Phlox, Phlox paniculata
- Mayapple, Podophyllum peltatum
- Jacob’s-Ladder, Polemonium reptans
- Great Solomon’s-Seal, Polygonatum commutatum
- Polyanthus Primrose, Primula x polyantha
- Lungwort, Pulmonaria species
- Bloodroot, Sanguinaria canadensis
- Siberian Squill, Scilla sibirica
- Goldmoss Stonecrop, Sedum acre
- Showy Sedum, Sedum spectabile
- Lamb’s-Ear, Stachy byzantina
- Spiderwort, Tradescantia virginiana
- Nodding Trillium, Trillium cernuum
- White Wake-Robin, Trillium grandiflorum
- Tulipa Darwin ‘White Volcano’ and ‘Cum Laude,’ ‘Parrot,’ ‘Blue Parrot,’ ‘Greigii Toronto’
- Big Merrybells, Uvularia grandiflora
- Canada Violet, Viola canadensis
- Horned Violet, Viola cornuta
- Woolly Blue Violet, Viola sororia
*Based upon observations and not from clinical tests
**Cultivars of some species may do poorly