Primula
Pulmonaria
Sanguinaria canadensis (Bloodroot)
Sedum acre
Sedum spectabile
Stachys byzantina (Lamb's Ears)
Thalictrum
Tradescantia x andersonia (Spiderwort)
Trillium cernuum
Trillium grandiflorum
Uvularia grandiflora
Veratrum viride
Vinca
Viola canadensis
Viola sororia
Annuals
Begonias - fibrous and non-stop
Calendula officinalis
Impatiens
Ipomea 'Heavenly Blue'
Tagetes (Marigold)
Viola x wittrockiana (Pansies)
Biennials
Forget-Me-Nots
Bulbs
Chionodoxa luciliae
Crocus
Endymion hispanicus
Eranthis hyemnalis
Galanthus nivalis
Hyacinthus 'City of Haarlem'
Lilium (tiger lilies)
Muscari botryoides (grape hyacinths)
Narcissus
Scilla sibirica
Tulipa - darwins and parrots and greigii 'Toronto'
Ferns
Adiantum
Blechum
Dryopteris
Onoclea sensibilis (sensitive fern)
Osmunda cinnamomea
Polystichum
Christmas Fern
Grasses
Festuca ovina
Leymus
Vines
Clematis montana
Clematis 'Rouge Cardinal'
Lonicera tatarica
Parthenocissus quinquefolia
Vitus (Grapes)
Wisteria japonica
Wisteria sinensis
Wisteria texensis
Shrubs
Camellia
Corylus avellana 'Contorta'
Daphne mezereum
Euonymus (burning bush)
Forsythia
Hamamelis
Hibiscus syriacus
Philadelphus (Mock Orange)
Rhododendron periclymenoides
Rhododendron 'Exbury Hybrids'
Sambucus spp. (Elderberry)
Syringia
Viburnums
Trees
Auraucaria auraucana (Monkey Puzzle Tree)
Acer palmatum (Japanese maples)
Catalpa bignonioides
Quercus
Thuja occindentalis
Tsuga canadensis
Food Plants If you want to grow a vegetable garden under a black walnut tree, you may encounter a few problems. Firstly, the toxicity they create. Secondly, surface roots making it difficult to cultivate. And of course the shade the tree will create.
Cabbage, eggplant, pepper, potato and tomato plants all are highly sensitive to juglone, so there is not much chance of growing those. Less sensitive are Lima beans, snap beans, beets, corn, onions and parsnips.
A few additional Tips
- Hardiness is key! The plants chosen must be just right for the location and your climate, as well as being tolerant of juglone.
- Be sure to keep your plants well fertilized. This may aid in resistance to juglone toxicity.
- The above lists are not conclusive. You will find other plants that are tolerant of juglone. Experiment with a small number of plants to start with
- Toxicity shows up in the form of yellow foliage, wilting and eventual death. Sometimes it can take as much as three years for a plant to show signs of succumbing to juglone.
Under My Own Black Walnut I am trying a few plants out under the shade of a very large Black Walnut. So far I have planted Corydalis cheilanthifolia, Salal (Gaultheria shallon) and a variety of mosses.
How to Tell us about Yours I welcome you to tell us what you have growing your own black walnut. Please join in on the discussions, or send me a personal E-mail and I'll post your findings here for all to read.
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