Companion species
Pick one native tree or shrub and see what grows with it. The matches come in three groups. Some species share its ground in the wild, and others live under its canopy or are the trees it can be planted beneath. The rest suit the same yard because they want the same sun, soil and climate. Every match is explained on the page, so you can see why a species is listed.
In the wild
Clammy Locust grows in the Appalachians, sandy barrens, old fields and edges
These natives share that ground, so they will look right together and want the same care.
Vaccinium pallidum Shrub, 1–3 ft
Robinia hispida Shrub, 3–8 ft · shares sandy barrens, old fields and edges Georgia Indigobush
Amorpha georgiana Shrub, 1–3 ft · shares sandy barrens, old fields and edges
Kalmia buxifolia Shrub, 1–3 ft · shares the Appalachians and sandy barrens
Prunus caroliniana Small tree, 15–40 ft · shares sandy barrens, old fields and edges
Callicarpa americana Shrub, 3–6 ft · shares sandy barrens, old fields and edges
Asimina longifolia Shrub, 3–6 ft · shares sandy barrens, old fields and edges
Vaccinium arboreum Small tree, 10–25 ft · shares sandy barrens, old fields and edges
In the yard
Trees to plant it under
Clammy Locust takes some shade, so it can live beneath these.
Common Hackberry
Celtis occidentalis Large tree Zones 3–9 40–60 ft
Shares old fields and edges in the wild.
Mockernut Hickory
Carya tomentosa Large tree Zones 4–9 60–80 ft
Shares sandy barrens in the wild. Hardy in zones 4 to 8 of the clammy locust's 3 to 8.
In the yard
Beside it
Plants that want the same sun and soil, for a bed, a hedge or a grove.
Downy Hawthorn
Crataegus mollis Small tree Zones 3–8 20–40 ft
Shares sandy barrens, old fields and edges in the wild.
Flatwoods Plum
Prunus umbellata Small tree Zones 4–10 12–20 ft
Shares sandy barrens, old fields and edges in the wild. Hardy in zones 4 to 8 of the clammy locust's 3 to 8.
Dwarf Hackberry
Celtis tenuifolia Small tree Zones 4–9 15–30 ft
Shares sandy barrens, old fields and edges in the wild. Hardy in zones 4 to 8 of the clammy locust's 3 to 8.
Chickasaw Plum
Prunus angustifolia Small tree Zones 5–9 4–20 ft
Shares sandy barrens, old fields and edges in the wild. Hardy in zones 5 to 8 of the clammy locust's 3 to 8.
Gum Bumelia
Sideroxylon lanuginosum Small tree Zones 5–10 15–45 ft
Shares sandy barrens, old fields and edges in the wild. Hardy in zones 5 to 8 of the clammy locust's 3 to 8.
Hercules' Club
Zanthoxylum clava-herculis Small tree Zones 6–10 15–40 ft
Shares sandy barrens, old fields and edges in the wild. Hardy in zones 6 to 8 of the clammy locust's 3 to 8.
Plan the planting
- When these flower and fruit, in the bloom and fruit calendar.
Be first
Email me when Clammy Locust or a companion is ready to order
For Clammy Locust, Northern Red Oak, Black Oak, Common Hackberry, Black Cherry, Bur Oak, Mockernut Hickory, Downy Hawthorn, Flatwoods Plum, Dwarf Hackberry, Chickasaw Plum, Gum Bumelia: one email per plant when it is priced or back in stock, and nothing else.
How the matches are made
- Natural communities. Every species we grow is tagged with the communities it lives in: floodplain forests, swamps and wet flats, stream banks, rich moist slopes, dry uplands, sandy barrens, rocky ground, old fields and edges, the forest understory, the Appalachians and the coast.
- In the wild. Up to eight natives that share one of those communities with it and grow wild in one of its states. The most communities in common come first, then the native range most like its own. A species in a yard list is not repeated here.
- Under its canopy, or trees to plant it under. Up to six species at least two sizes apart, the smaller one taking part shade or shade: shrubs under a medium tree, shrubs and small trees under a large one.
- Beside it. Up to six that share a sun with it, the same size first.
- The order of a yard list. Every yard pick shares a zone, a soil and a state of native range with it. A shared community counts two points, and a shared sun or soil one. Under a canopy, a species of the forest understory counts two more, and one that takes full shade one more. Of equal scores, the one hardy in more of its zones comes first.
- Your zone. With a zone chosen, the yard lists keep only species rated hardy in it.
- Black walnut. The 37 species we grow that the Morton Arboretum lists as sensitive to its juglone are left out of its answer, and it is left out of theirs. Under a walnut, the species on Morton's tolerant lists come first and are marked.
- Eastern red cedar. The 25 crabapples, hawthorns, serviceberries, chokeberries and mountain ash we grow are left out of its answer, and it is left out of theirs: the cedar-apple, hawthorn, quince and juniper broom rusts live on both, and the University of Minnesota Extension says to keep them a few hundred yards apart.
- A tree we do not grow. The note under the menu names a relative we grow, in the words of its page.
The communities are our own tags. The states of native range are the USDA PLANTS Database's records, read on 2026-09-23, as the native trees by state tool reads them. Zones, sun and soil are each species' own page. The juglone lists are the Morton Arboretum's, read on 2026-10-05, which warns that "any list regarding this topic is incomplete and some of the information may be anecdotal." The rusts' hosts are the University of Minnesota Extension's, read on 2026-10-06. What to plant under a big tree and the article on juglone cover the subject.
Sharing a habitat tag does not mean two plants always grow side by side, and a tag says nothing about how far apart to plant them. Use the planting-site check for the spot itself, and the growth estimator for how much room each one will want in twenty years.