Culver's Root
Veronicastrum virginicum
Punches its roots through dense clay where garden-center perennials sulk, at 3–5 ft tall, flowering as it blooms Jun through Aug.
- Full–part sun
- Average–wet
- 3–5 ft
- Blooms Jun–Aug
Tennessee · Zones 6–8
Native Plants for Clay Soil in Tennessee
Native plants that root happily into heavy clay — the dense, slow-draining soil that defeats so many garden-center perennials. For Tennessee, the right natives are shaped by Cumberland Plateau, Ridge & Valley, cedar glades and a humid, four-season climate. Every species below, from Culver's Root and Trumpet Honeysuckle to the rest of the list, is genuinely native to Tennessee and the wider flora of the Southeast and hardy through zones 6–8. Heavy clay is actually fertile and moisture-holding; the trick is choosing plants whose deep, muscular roots can punch through it and even improve it over time. Avoid working clay when it is wet, plant a little high to keep crowns from sitting in water, and mulch to keep the surface from baking into a crust. These natives do the soil-building for you.
The plants
50 native species for Tennessee
Each one native to your region and hardy in zones 6–8 · see this collection in other states.
Trumpet Honeysuckle
Lonicera sempervirens
A clay-buster — thrives in the slow-draining ground, 8–15 ft tall — it blooms Apr through Sep.
- Full–part sun
- Dry–average
- 8–15 ft
- Blooms Apr–Sep
New England Aster
Symphyotrichum novae-angliae
A clay-buster — thrives in the slow-draining ground, 3–5 ft tall; it flowers in Sep and Oct.
- Full–part sun
- Average–wet
- 3–5 ft
- Blooms Sep–Oct
Crossvine
Bignonia capreolata
Punches its roots through dense clay where garden-center perennials sulk, at 25–50 ft tall, and it flowers in Apr and May.
- Full–part sun
- Dry–average
- 25–50 ft
- Blooms Apr–May
Obedient Plant
Physostegia virginiana
A clay-buster — thrives in the slow-draining ground, 2–4 ft tall — it flowers in Aug and Sep.
- Full–part sun
- Average–wet
- 2–4 ft
- Blooms Aug–Sep
Foxglove Beardtongue
Penstemon digitalis
Roots straight into heavy clay and even improves it, standing 2–4 ft tall, and it flowers in May and Jun.
- Full–part sun
- Dry–average
- 2–4 ft
- Blooms May–Jun
Eastern Redbud
Cercis canadensis
Punches its roots through dense clay where garden-center perennials sulk, at 20–30 ft tall — it flowers in Mar and Apr.
- Full–part sun
- Dry–average
- 20–30 ft
- Blooms Mar–Apr
Turk's Cap
Malvaviscus arboreus var. drummondii
A clay-buster — thrives in the slow-draining ground, 2–5 ft tall — it blooms May through Oct.
- Sun to shade
- Dry–average
- 2–5 ft
- Blooms May–Oct
Smooth Hydrangea
Hydrangea arborescens
Roots straight into heavy clay and even improves it, standing 3–5 ft tall; it blooms Jun through Aug.
- Part shade
- Average
- 3–5 ft
- Blooms Jun–Aug
Swamp Milkweed
Asclepias incarnata
At home in the dense clay that defeats most perennials, 3–4 ft tall, flowering as it flowers in Jul and Aug.
- Full–part sun
- Average–wet
- 3–4 ft
- Blooms Jul–Aug
Spotted Joe-Pye Weed
Eutrochium maculatum
A clay-buster — thrives in the slow-draining ground, 4–7 ft tall, flowering as it blooms Jul through Sep.
- Full–part sun
- Average–wet
- 4–7 ft
- Blooms Jul–Sep
Maximilian Sunflower
Helianthus maximiliani
A clay-buster — thrives in the slow-draining ground, 5–8 ft tall — it blooms Aug through Oct.
- Full sun
- Dry–average
- 5–8 ft
- Blooms Aug–Oct
Wild Bergamot
Monarda fistulosa
At home in the dense clay that defeats most perennials, 2–4 ft tall, flowering as it blooms Jun through Aug.
- Full–part sun
- Dry–average
- 2–4 ft
- Blooms Jun–Aug
Prairie Blazing Star
Liatris pycnostachya
At home in the dense clay that defeats most perennials, 3–5 ft tall, flowering as it flowers in Jul and Aug.
- Full sun
- Dry–average
- 3–5 ft
- Blooms Jul–Aug
Short-Toothed Mountain Mint
Pycnanthemum muticum
Roots straight into heavy clay and even improves it, standing 2–3 ft tall, and it blooms Jul through Sep.
- Full–part sun
- Dry–average
- 2–3 ft
- Blooms Jul–Sep
Cardinal Flower
Lobelia cardinalis
A clay-buster — thrives in the slow-draining ground, 2–4 ft tall — it blooms Jul through Sep.
- Full–part sun
- Average–wet
- 2–4 ft
- Blooms Jul–Sep
Buttonbush
Cephalanthus occidentalis
Roots straight into heavy clay and even improves it, standing 5–10 ft tall; it blooms Jun through Aug.
- Full–part sun
- Average–wet
- 5–10 ft
- Blooms Jun–Aug
Dense Blazing Star
Liatris spicata
Roots straight into heavy clay and even improves it, standing 2–4 ft tall; it flowers in Jul and Aug.
- Full sun
- Average–wet
- 2–4 ft
- Blooms Jul–Aug
Common Yarrow
Achillea millefolium
A clay-buster — thrives in the slow-draining ground, 1.5–3 ft tall; it blooms May through Aug.
- Full sun
- Dry–average
- 1.5–3 ft
- Blooms May–Aug
Purple Coneflower
Echinacea purpurea
A clay-buster — thrives in the slow-draining ground, 2–4 ft tall, and it blooms Jun through Sep.
- Full–part sun
- Dry–average
- 2–4 ft
- Blooms Jun–Sep
Scarlet Beebalm
Monarda didyma
A clay-buster — thrives in the slow-draining ground, 2.5–4 ft tall, flowering as it flowers in Jul and Aug.
- Full–part sun
- Average–wet
- 2.5–4 ft
- Blooms Jul–Aug
Serviceberry
Amelanchier canadensis
A clay-buster — thrives in the slow-draining ground, 15–25 ft tall, flowering as it flowers in Apr and May.
- Full–part sun
- Average–wet
- 15–25 ft
- Blooms Apr–May
Great Blue Lobelia
Lobelia siphilitica
At home in the dense clay that defeats most perennials, 2–3 ft tall, flowering as it flowers in Aug and Sep.
- Full–part sun
- Average–wet
- 2–3 ft
- Blooms Aug–Sep
Arrowwood Viburnum
Viburnum dentatum
Punches its roots through dense clay where garden-center perennials sulk, at 6–10 ft tall; it flowers in May and Jun.
- Sun to shade
- Average–wet
- 6–10 ft
- Blooms May–Jun
26 more also qualify: Black-Eyed Susan, Aromatic Aster, Butterfly Weed, Cup Plant, Winterberry, American Beautyberry, Golden Alexanders, Spicebush, Red-Twig Dogwood, Compass Plant, Virginia Creeper, Inkberry Holly, Stiff Goldenrod, Fragrant Sumac, Common Milkweed, Sideoats Grama, American Elderberry, Blue Vervain, Common Boneset, Rattlesnake Master, Ninebark, Big Bluestem, Cinnamon Fern, Little Bluestem, Switchgrass, Indian Grass.
Sourcing
Where to find these in Tennessee
Seeds & live plants on Amazon
Seed packets, plugs, and starter plants for many of these species ship to your door.
Browse on AmazonSome links here are affiliate links — we may earn a small commission at no extra cost to you. The surest source of locally-adapted stock is a native-plant nursery or a native plant society sale in your area.