Plants that Do Not Grow within 50’ of Black Walnut Drip Line
Herbaceous Perennials
- Colorado Columbine, Aquilegia caerulea
- Wild Columbine, Aquilegia Canadensis
- Asparagus, Asparagus offinalis
- *Chrysanthemum Chrysanthumum species (some)
- Baptisia australis
- Hydrangea species
- Lilies, Lilium species (particularly the Asian hybrids)
- Alfalfa, Medicago sativa
- Buttercup, Narcissus ‘John Evelyn,’ ‘Unsurpassable,’ ‘King Alfred,’ and ‘Ice Follies’
- Peonies, *Paeonia species (some)
- Rhubarb, Rheum rhabarbarum
Trees
- Silver Maple, Acer saccharinum
- European Alder, Alnus glutinosa
- White Birches, Betula species
- Northern Hackberry, Celtis occidentalis
- Apples and Crabapples, Malus species
- Norway Spruce, Picea abies
- Mugo Pine, Pinus mugo
- Red Pine, Pinus resinosa
- Eastern White Pine, Pinus strobus
- Basswood, Tilia heterophylla
Shrubs
- Red Chokeberry, Aronia arbutifolia
- Hydrangea species
- Mountain Laurels, Kalmia species
- Privet, Ligustrum species
- Amur Honeysuckle, Lonicera maackii
- Brush Cinquefoil, Potentilla species
- Rhododendrons and Azaleas, **Rhododendron species (most)
- Blackberry, Rubus allegheniensis
- Lilacs, Syringa species and cultivars
- Yew, Taxus species
- Blueberry, Vaccinium corymbosum
- *Viburnum plicatum tomentosum ‘Mariesii’
Annuals and Vegetable Transplants
- Cabbage, Brassica oleracea capitata
- Peppers, Capsicum species (some)
- Tomatoes, Lycopersicon esculentum
- Flowering Tobacco, Nicotiana alata
- Petunia species and cultivars
- Eggplant, Solanum melongena
- Potato, Solanum tuberosum
*Cultivars of some species may survive but will do poorly