# Companion species

> Pick one native tree or shrub and see the species that share its ground in the wild, live under its canopy, or want the same sun, soil and climate in a yard.

Blue Whale Trees, a native tree nursery in the United States. Web version: https://bluewhaletrees.com/tools/companions/?species=farkleberry

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.

Black walnut is left out. The Morton Arboretum lists blueberry among the plants its juglone harms.

[What to plant under a black walnut](https://bluewhaletrees.com/articles/juglone-what-to-plant-under-a-black-walnut/index.html.md) tables the shrubs and small trees that two or more lists call tolerant and none calls sensitive.

## Farkleberry grows in sandy barrens, dry uplands, rocky ground, the forest understory, old fields and edges

These natives share that ground, so they will look right together and want the same care.

- [Deerberry](https://bluewhaletrees.com/plants/deerberry/index.html.md) (*Vaccinium stamineum*): Shrub, 5–15 ft · shares sandy barrens, dry uplands, rocky ground and the forest understory
- [New Jersey Tea](https://bluewhaletrees.com/plants/new-jersey-tea/index.html.md) (*Ceanothus americanus*): Shrub, 2–3 ft · shares sandy barrens, dry uplands, rocky ground, old fields and edges
- [Hillside Blueberry](https://bluewhaletrees.com/plants/hillside-blueberry/index.html.md) (*Vaccinium pallidum*): Shrub, 1–3 ft · shares sandy barrens, dry uplands, rocky ground, old fields and edges
- [Downy Arrowwood](https://bluewhaletrees.com/plants/downy-arrowwood/index.html.md) (*Viburnum rafinesqueanum*): Shrub, 3–10 ft · shares dry uplands, rocky ground, the forest understory, old fields and edges
- [Black Huckleberry](https://bluewhaletrees.com/plants/black-huckleberry/index.html.md) (*Gaylussacia baccata*): Shrub, 1–3 ft · shares sandy barrens, dry uplands, rocky ground and the forest understory
- [Prairie Redroot](https://bluewhaletrees.com/plants/prairie-redroot/index.html.md) (*Ceanothus herbaceus*): Shrub, 2–3 ft · shares sandy barrens, dry uplands, rocky ground, old fields and edges
- [Gray Dogwood](https://bluewhaletrees.com/plants/gray-dogwood/index.html.md) (*Cornus racemosa*): Shrub, 4–10 ft · shares dry uplands, rocky ground, the forest understory, old fields and edges
- [Dangleberry](https://bluewhaletrees.com/plants/dangleberry/index.html.md) (*Gaylussacia frondosa*): Shrub, 2–6 ft · shares sandy barrens, dry uplands, the forest understory, old fields and edges

## Trees to plant it under

Farkleberry takes some shade, so it can live beneath these.

- [Mockernut Hickory](https://bluewhaletrees.com/plants/mockernut-hickory/index.html.md) (*Carya tomentosa*): Large tree, Zones 4–9, 60–80 ft, Price on request. Shares sandy barrens, dry uplands and rocky ground in the wild. Hardy in zones 6 to 9 of the farkleberry's 6 to 10.
- [Pignut Hickory](https://bluewhaletrees.com/plants/pignut-hickory/index.html.md) (*Carya glabra*): Large tree, Zones 4–9, 50–80 ft, Price on request. Shares sandy barrens, dry uplands and rocky ground in the wild. Hardy in zones 6 to 9 of the farkleberry's 6 to 10.
- [Black Oak](https://bluewhaletrees.com/plants/black-oak/index.html.md) (*Quercus velutina*): Large tree, Zones 3–9, 50–80 ft, Price on request. Shares sandy barrens, dry uplands and rocky ground in the wild. Hardy in zones 6 to 9 of the farkleberry's 6 to 10.
- [Common Hackberry](https://bluewhaletrees.com/plants/common-hackberry/index.html.md) (*Celtis occidentalis*): Large tree, Zones 3–9, 40–60 ft, Price on request. Shares dry uplands, rocky ground, old fields and edges in the wild. Hardy in zones 6 to 9 of the farkleberry's 6 to 10.
- [Sand Hickory](https://bluewhaletrees.com/plants/sand-hickory/index.html.md) (*Carya pallida*): Large tree, Zones 5–9, 40–100 ft, Price on request. Shares sandy barrens, dry uplands and rocky ground in the wild. Hardy in zones 6 to 9 of the farkleberry's 6 to 10.
- [Southern Red Oak](https://bluewhaletrees.com/plants/southern-red-oak/index.html.md) (*Quercus falcata*): Large tree, Zones 6–9, 60–80 ft, Price on request. Shares sandy barrens and dry uplands in the wild. Hardy in zones 6 to 9 of the farkleberry's 6 to 10.

## Beside it

Plants that want the same sun and soil, for a bed, a hedge or a grove.

- [Gum Bumelia](https://bluewhaletrees.com/plants/gum-bumelia/index.html.md) (*Sideroxylon lanuginosum*): Small tree, Zones 5–10, 15–45 ft, Price on request. Shares sandy barrens, dry uplands, rocky ground, old fields and edges in the wild.
- [Dwarf Hackberry](https://bluewhaletrees.com/plants/dwarf-hackberry/index.html.md) (*Celtis tenuifolia*): Small tree, Zones 4–9, 15–30 ft, Price on request. Shares sandy barrens, dry uplands, rocky ground, old fields and edges in the wild. Hardy in zones 6 to 9 of the farkleberry's 6 to 10.
- [Gray Birch](https://bluewhaletrees.com/plants/gray-birch/index.html.md) (*Betula populifolia*): Small tree, Zones 3–8, 20–40 ft, Price on request. Shares sandy barrens, dry uplands, rocky ground, old fields and edges in the wild. Hardy in zones 6 to 8 of the farkleberry's 6 to 10.
- [Harbison's Hawthorn](https://bluewhaletrees.com/plants/harbison-hawthorn/index.html.md) (*Crataegus harbisonii*): Small tree, Zones 5–8, 10–26 ft, Price on request. Shares dry uplands, rocky ground, the forest understory, old fields and edges in the wild. Hardy in zones 6 to 8 of the farkleberry's 6 to 10.
- [Flatwoods Plum](https://bluewhaletrees.com/plants/flatwoods-plum/index.html.md) (*Prunus umbellata*): Small tree, Zones 4–10, 12–20 ft, Price on request. Shares sandy barrens, dry uplands, old fields and edges in the wild.
- [Rusty Blackhaw](https://bluewhaletrees.com/plants/rusty-blackhaw/index.html.md) (*Viburnum rufidulum*): Small tree, Zones 5–9, 10–20 ft, Price on request. Shares dry uplands, rocky ground, old fields and edges in the wild. Hardy in zones 6 to 9 of the farkleberry's 6 to 10.
- [When these flower and fruit](https://bluewhaletrees.com/tools/calendar/#plants=farkleberry,mockernut-hickory,pignut-hickory,black-oak,common-hackberry,sand-hickory,southern-red-oak,gum-bumelia,dwarf-hackberry,gray-birch,harbison-hawthorn,flatwoods-plum,rusty-blackhaw), in the bloom and fruit calendar.

## Email me when Farkleberry or a companion is ready to order

For Farkleberry, Mockernut Hickory, Pignut Hickory, Black Oak, Common Hackberry, Sand Hickory, Southern Red Oak, Gum Bumelia, Dwarf Hackberry, Gray Birch, Harbison's Hawthorn, Flatwoods Plum: 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](https://bluewhaletrees.com/tools/native/index.html.md) 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](https://bluewhaletrees.com/articles/what-to-plant-under-a-big-tree/index.html.md) and [the article on juglone](https://bluewhaletrees.com/articles/juglone-what-to-plant-under-a-black-walnut/index.html.md) 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](https://bluewhaletrees.com/tools/site-check/index.html.md) for the spot itself, and the [growth estimator](https://bluewhaletrees.com/tools/growth/index.html.md) for how much room each one will want in twenty years.