Black Walnut Lists
You may previously have accessed this list as a Page--but I'm moving it to a Post location because I am really, really redesigning this website and want to preserve this content when I import all my stuff to a new layout.

If you wonder what all the fuss is about concerning Black Walnut trees, it's that they are particularly effective in "poisoning" other plants around them in order to eliminate competition. Some plants are resistant to this process, others are not. This resistance (or lack thereof) is referred to as juglone sensitivity. Juglone is given off through the roots of walnut trees, and the Eastern Black Walnut (Juglans nigra) is the most toxic of the bunch. I found out the hard way.

For other posts on Black Walnuts, go to Black Walnut "Blight" or The Problem With Black Walnut Trees.

Note: A list is not a guarantee--too many variables! However, based on consistency of reporting across multiple sources, you should be able to reliably predict that plants here will perform as listed, so far as juglone sensitivity goes. Be careful when shopping to use the Latin name--"hydrangea," for example, is sensitive to black walnut (nearly all species are imports)... but the hydrangea arborescens, our native hydrangea, is resistant. I'm going to limit my list to native plants and common home vegetables or herbs--for other possibilities, check the resources at the bottom of the page.  [Updated 6/16/2011]


Acer saccharinum  (Silver Maple)
Aronia arbutifolia (Red Chokeberry) also, Photinia pyrifolia
Betula nigra  (River Birch)
Carpinus caroliniana  (American Hornbeam)
Ceanothus americanus (New Jersey Tea)
Celtis occidentalis (Hackberry)
Chionanthus virginica (Fringetree)
Cornus amomum (Silky Dogwood)
Halesia carolina (Carolina Silverbell)
Ilex opaca (American Holly)
Ilex verticillata (Winterberry Holly)
Kalmia latifolia (Mountain Laurel)
Liquidambar sryraciflua (Sweetgum)
Malus spp. (Crabapple, apple)
Pinus resinosa (Red Pine)
Pinus strobus (Eastern White Pine)
Dasiphora fruiticosa (Shrubby Cinquefoil)
Quercus coccinea (Scarlet Oak)
Quercus imbricaria (Shingle Oak)
Rhododendron spp. (Rhododendron, Azalea)
Tilia americana (Basswood)
Vaccinium spp. (Blueberry)
Viburnum dentatum (Arrowwood Viburnum)


Aquilegia canadensis (Wild Columbine)
Baptisia australis (Blue Wild Indigo)
Solanum lycopersicum (Tomato)
Solanum tuberosum (Potato)


Acer palmatum (Japanese Maple)
Acer rubrum (Red Maple)
Acer saccharum (Sugar Maple)
Aesculus glabra (Ohio buckeye)
Amelanchier arborea (Common Serviceberry)
Asimina triloba (Pawpaw)
Berberis canadensis (American Barberry)
Catalpa bignonoides (Common Catalpa)
Celastrus scandens (American Bittersweet)  [This is the native, but it will still strangle a tree. Use a trellis or fence.]
Cercis canadensis (Eastern Redbud)
Chasmanthium latifolium (Inland Sea Oats)
Clematis virginiana (choose the "virginiana"--"ternifolia" is invading Great Smoky Mtn. National Park)
Cornus alternifolia (Alternate-leaved dogwood)
Cornus florida (Flowering Dogwood)
Corylus Americana (Hazelnut)
Crataegus spp. (Hawthorn)
Fagus grandifolia (American Beech)
Gleditsia triacathos (Honey locust)
Hamamelis virginiana (Witch Hazel)
Hydrangea arborescens (Wild Hydrangea -- native)
Hypericum prolificum (Shrubby St. Johnswort)
Juniperus virginiana (Red Cedar)
Lindera benzoin (Spicebush)
Liriodendron tulipifera (Tuliptree, tulip poplar, yellow poplar)
Nyssa sylvatica (Black Gum)
Parthenocissus quinquefolia (Virginia Creeper)
Philadelphus (Mock Orange)
Platanus occidentalis (Sycamore)
Physocarpus opulifolius (Common Ninebark)
Quercus alba (White Oak)
Quercus coccinea (Red Oak)
Quercus velutina (Black Oak)
Rhododendron periclymenoides (Pinxterbloom, Swamp Azalea)
Rhus copallinum (Winged Sumac)
Rhus glabra (Smooth Sumac)
Rhus typhina (Staghorn Sumac)
Ribes spp. (Currant) Link shows map with regionally appropriate species.
Rosa carolina (Carolina Wild rose)
Rubus occidentalis (Black Raspberry)
Sambucus nigra ssp. canadensis (American Elderberry)
Sassafras albidum (Sassafras)  Has its own allelopathic properties.
Smilax spp. (Greenbrier)
Toxicodendron radicans (Poison Ivy... I know, but it's a great habitat plant!)
Tradescantia virginiana (Spiderwort)
Tsuga canadensis (Canadian Hemlock)
Ulmus americana (American Elm)
Viburnum acerifolium (Maple-Leaved Viburnum--make sure you get a match to the Latin)
Viburnum prunifolium (Black Haw Viburnum)


Achillea millefolium (Common Yarrow)
Anemone spp. (Thimbleweed, Windflower) Link shows map with regionally appropriate species.
Arisaema triphyllum (Jack-in-the-Pulpit)
Asarum spp. (Wild Ginger)
Aster spp. (Aster)
Campanula americana (Tall Bellflower)
Carex spp. (Sedge)
Chasmanthium latifolium (Inland Sea Oats)
Claytonia spp. (Carolina Springbeauty)
Dennstaedtia spp. (Hayscented Fern)
Dryopteris spp. (Wood Fern)
Erigeron annuus (Eastern Daisy Fleabane)
Erythronium americanum (Trout Lily)
Erythronium spp. (Dog Tooth Violet)
Eupatorium purpureum (Joe-Pye Weed) [Boneset may be another possibility]
Galium spp. (Sweetwoodruff)
Gentiana (Gentian)
Geranium maculatum (Wild Geranium)
Helenium spp. (Sneezeweed)
Helianthus spp. (Sunflower)
Hemerocallis spp. (Daylily) NOT NATIVE
Heuchera americana, villosa (Alumroot)
Hydrophyllum virginianum (Virginia waterleaf)
Impatiens capensis (Jewelweed)
Lobelia cardinalis (Cardinal Flower)
Lobelia spicata (Spiked Lobelia)
Matteuccia struthiopteris (Ostrich Fern)
Monarda didyma (Bee Balm)
Monarda fistulosa (Wild Bergamot)
Monarda punctata (Horsemint)
Oenothera biennis (Common Evening Primrose)
Oenothera speciosa (Pink Evening Primrose)
Onoclea sensibilis (Sensitive Fern)
Osmunda cinnamomea (Cinnamon Fern)
Phlox paniculata (Perennial Phlox)
Podophyllum peltatum (Mayapple)
Polemonium reptans (Jacob's Ladder)
Polygonatum spp. (Solomon's seal)
Polystichum acrostichoides (Christmas Fern)
Potentilla canadensis (common Cinquefoil)
Rudbeckia hirta (Black-eyed Susan)
Sanguinaria canadensis (Bloodroot)
Solidago spp. (Goldenrod)
Stachys byzantina (Lamb's ear) NOT NATIVE, but a great pollinator plant
Stylophorum diphyllum (Wood Poppy,Yellow Poppy, Celandine Poppy)
Tiarella cordifolia (Foam Flower)
Tradescantia virginiana (Spiderwort)
Trillium spp. (Trillium)
Viola canadensis (Canadian Violet)
Viola sororia (Common Blue Violet)


Squashes, melons, beans (soy, lima, snap), carrots, corn, beets, onions, parsnips, wheat, garlic chives

Mr. Smarty PantsVirginia Cooperative ExtensionMichigan State University, North Carolina Cooperative Extension Service, Ohio State UniversityMorton Arboretum
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