Native trees for the Southern Appalachians: the valleys, the slopes and the high ridges

In the Southern Appalachians, elevation decides most of what to plant. Chinquapin oak, blue ash and yellowwood take the limestone valley floors. Yellow buckeye, cucumber magnolia and Carolina silverbell want the deep, moist soil of the coves. Chestnut oak and mountain laurel hold the dry ridges. Red spruce, yellow birch and mountain ash belong on the high ridges, and Fraser fir on the highest peaks. This guide covers the mountain counties of Virginia, West Virginia, Kentucky, Tennessee, North Carolina, South Carolina, Georgia and Alabama.

The Blue Ridge, the valleys and the plateau

The Blue Ridge, the backbone of the Appalachians, is mostly ancient metamorphic rock, and its crystalline ridges carry well-drained, acid, loamy soil. It holds the highest peaks: Kuwohi, once called Clingmans Dome, rises to 6,643 feet in the Smokies, and Brasstown Bald to 4,784 feet in Georgia.

West of it lies the Ridge and Valley, folded rock with valleys of limestone, dolomite and shale, and many caves and springs. Georgia calls its stretch the Great Valley, and Alabama the Coosa Valley. Beyond it the Cumberland Plateau runs from Kentucky to Alabama, flat-lying sandstone and shale cut into rocky ridges and deep gorges, with acid soil of low fertility.

Native trees for the Mid-Atlantic covers Virginia and West Virginia whole, and native trees for the Southeast the Carolinas, Georgia, Tennessee and Kentucky below them.

Zones, rain and when to plant

Zones by elevation

On the 2023 hardiness maps the zone falls as the ground rises. The coldest mountain ground in each state:

Asheville and Knoxville sit at 7b, a zone and a half warmer than the 6a peaks nearby. The Smokies’ summits run 10 to 20 degrees colder than the base and get about 85 inches of rain a year, against 55 in the lowlands. A valley bottom can still be a frost pocket, so set Fraser magnolia, the earliest native magnolia to bloom, a little upslope. The ZIP code lookup gives your half zone.

When to plant

Plant while the tree is dormant, though sources split on the season. Haywood County’s extension center, in the North Carolina mountains, argues for fall:

“Contrary to popular opinion, fall is the best time to plant […] trees, shrubs, and perennials.” (N.C. Cooperative Extension, Haywood County Center, Fall Is the Right Time to Plant Trees and Shrubs)

Roots keep growing through late fall and winter, so a fall-planted tree starts spring ahead. The Morton Arboretum puts spring first:

“For many species, spring is the best season for planting.” (The Morton Arboretum, How to Plant Trees and Shrubs)

A fall planting wants about six weeks before the ground freezes, so on the high ground, where snow can come by November, plant early in fall or wait for spring. Magnolias and hemlocks establish slowly and do best planted in spring. Blue Whale Trees ships live plants from February to May and from October to November, while they are dormant.

The valleys and their limestone

Many valley floors lie on limestone and dolomite, and these trees take limy ground:

• Chinquapin oak, the white oak of limestone. Zones 3 to 8, 40 to 60 feet.
• Blue ash, for thin, alkaline ground, and the ash least hurt by emerald ash borer. Zones 4 to 7, 50 to 70 feet.
• Yellowwood, at home in rich limestone soil in river valleys. Zones 4 to 8, 30 to 50 feet.
• Shumard oak, a red oak little troubled by yellowing on alkaline soil. Zones 5 to 9, 50 to 80 feet.
• Bur oak, which takes lime, drought and heavy clay. Zones 3 to 8, 60 to 80 feet.
• Kentucky coffeetree, for drought and alkaline soil. Zones 3 to 8, 60 to 80 feet.
• Common hackberry, fastest on neutral to limy loam. Zones 3 to 9, 40 to 60 feet.

The acid-soil plants of the slopes struggle on lime. Mountain laurel fails on it, and rosebay rhododendron, sourwood and silverbell turn yellow between the veins. Test a valley soil before planting them.

The slopes and coves

The coves and the north and east faces hold deep, moist soil. Oak woods cover the ridges and the south and west faces.

The coves

In the coves, deep soil grows big hardwoods over a carpet of wildflowers.

The cove trees we grow, tallest first:

Beneath them, in the shade:

• Rosebay rhododendron, which forms evergreen thickets along shaded mountain streams. Zones 3 to 7, 10 to 15 feet.
• Witch hazel, which flowers from October into December. Zones 3 to 8, 12 to 20 feet.

The dry ridges and the plateau

On the plateau, too, oaks hold the tablelands, and the rich mixed forest keeps mostly to the deep ravines. These grow wild on the ridges and the plateau:

• Chestnut oak, the white oak of dry ridgetops, to about 4,600 feet. Zones 4 to 8, 50 to 70 feet.
• Table Mountain pine, a pine of dry, rocky ridges, mostly at 1,000 to 4,000 feet, renewed by fire. Zones 5 to 7, 20 to 40 feet.
• Carolina hemlock, an evergreen of rocky ridges and bluffs at 2,100 to 4,000 feet, for a shaded slope. Zones 6 to 7, 40 to 60 feet.
• Mountain laurel, the evergreen shrub of acid, rocky ground under oaks. Zones 4 to 9, 5 to 12 feet.
• Flame azalea, the wild azalea of south and west slopes and the grassy balds. Zones 5 to 7, 4 to 12 feet.
• Cumberland azalea, the plateau’s red azalea, in bloom in June and July. Zones 4 to 8, 3 to 7 feet.

The high ridges

In these mountains red spruce grows above about 4,500 feet, and above 6,200 feet Fraser fir outnumbers it. Fraser fir, a relict of the ice ages, grows wild on only 7 to 10 crests in Virginia, North Carolina and Tennessee. Shrub, grass and heath balds break the forest along the high ridges.

For the high ground:

• Red spruce, for a cool, moist site. Zones 2 to 6, 60 to 75 feet.
• Fraser fir, a narrow evergreen for a cool, moist spot. Zones 4 to 7, 30 to 55 feet.
• Yellow birch, mostly above 3,000 feet here. Zones 3 to 7, 60 to 75 feet.
• American mountain ash, nearly the fir’s only canopy neighbor on the summits. Zones 2 to 7, 15 to 30 feet.
• Mountain maple, at 2,800 to 5,600 feet. Zones 2 to 7, 10 to 25 feet.
• Hobblebush, the viburnum of cool mountain forests. Zones 3 to 6, 3 to 12 feet.
• Catawba rhododendron, the evergreen of ridges and balds up to about 6,500 feet. Zones 4 to 8, 6 to 10 feet.

Most want cool summers, and mountain ash struggles in hot lowland gardens.

The chestnut’s ground

American chestnut, nearly four billion trees, once dominated parts of the eastern forest. A blight from Asia, first found in 1904, reduced it in about 50 years to a shrub that sprouts from its roots and dies back.

Many of its old woods became oak and hickory and are now turning toward maple. We do not grow five of its companions here: tulip tree, eastern hemlock, white pine, pitch pine and scarlet oak. For the chestnut’s ground:

• American chestnut, a living link to the old forest that the blight will likely cut back. Zones 4 to 8, 15 to 30 feet.
• Allegheny chinquapin, a small chestnut whose cankered stems resprout and keep bearing. Zones 5 to 9, 10 to 25 feet.
• Northern red oak, which climbs to 5,500 feet here. Zones 3 to 8, 50 to 75 feet.
• White oak, on dry ridges, rich slopes and coves alike. Zones 3 to 9, 50 to 80 feet.

Chinquapin or chestnut covers the blight and telling the two apart.

Pests, disease, deer and bears

Hemlock woolly adelgid

The hemlock woolly adelgid, an insect from Asia, reached North Carolina in 1995 and Tennessee in 2002, and it now infests the hemlock’s whole range in both. Nearly all untreated stands in western North Carolina are dead or in sharp decline. We do not grow eastern hemlock.

Carolina hemlock dies of it within a few years unless treated. Look for white wool on the twigs, plant it where it is easy to inspect, and treat it with imidacloprid in the soil.

Balsam woolly adelgid

The balsam woolly adelgid, from Europe, was found on Mount Mitchell in 1957 and has killed most mature wild Fraser firs everywhere but Mount Rogers in Virginia. In 2024 it stayed scarce at four summit sites in the Smokies, where young firs were thriving:

“Younger fir trees typically show greater resilience than older ones; however, the definitive outcome will only be determined over time.” (National Park Service, Great Smoky Mountains National Park, Non-native species)

Insecticide can protect a planted fir, though not a forest.

Ash, oak, beech, walnut and sassafras

• Emerald ash borer reached the Smokies in 2013 and has turned up in 66 Tennessee and 77 North Carolina counties. It attacks white fringetree as well as the ashes.
• Oak wilt has been in the North Carolina mountains since 1951 and hits red oaks hardest, so prune oaks only in the dormant season. Oak decline has struck northern red oak across much of the central Appalachians.
• Beech bark disease is the main threat to North Carolina’s beech, and beech leaf disease has reached Virginia.
• Thousand cankers disease of black walnut has been found in Tennessee and Virginia, and since 2012 in North Carolina’s Haywood County. Watch for a crown thinning from the top.
• Laurel wilt kills sassafras and spicebush, often within weeks. It reached Tennessee in 2019 but had not been found in North Carolina’s mountains by 2025.

Deer and bears

Deer damage flame azalea and Catawba rhododendron often and browse rosebay rhododendron in winter. They seldom touch red spruce or Fraser fir. Tube or cage each sapling for its first three years, as protecting trees from animals shows. Black bears eat the mast too: acorns, chinquapins and dogwood fruit.

Where to start

• Your state’s natives: Virginia, West Virginia, Kentucky, Tennessee, North Carolina, South Carolina, Georgia and Alabama each have a list.
• A tree for a cove: the site check tests a yellow buckeye in zone 6, part shade and average soil, 30 feet from a wall.
• Shade on the high ground: the tree finder is set to zone 6, a small tree, shade and average soil.
• Seed: acorns, nuts and seed ship in any month.

Common questions

What native trees grow in western North Carolina?

Yellow buckeye, cucumber magnolia, sourwood and silverbell grow in the coves and on the slopes, and chestnut oak on the dry ridges. Red spruce, Fraser fir and yellow birch grow on the high ridges.

What trees grow at high elevation in the Appalachians?

Red spruce grows above about 4,500 feet and Fraser fir on the highest peaks. Yellow birch, mountain ash, mountain maple, hobblebush and Catawba rhododendron share the high ridges.

What hardiness zone is Asheville, North Carolina?

Zone 7b on the 2023 hardiness map, while the Black Mountains and the Smokies’ crest nearby fall to 6a.

What trees grow in a mountain cove?

Yellow buckeye, cucumber and Fraser magnolia, basswood, sweet birch and silverbell, on deep, moist soil. Rosebay rhododendron and witch hazel fill the shade beneath them.

When should I plant trees in the mountains?

While they are dormant: fall in the valleys, and early fall or spring on the high ground, where snow can come by November. Plant magnolias and hemlocks in spring.