Butterfly Weed
Asclepias tuberosa
Punches its roots through dense clay where garden-center perennials sulk, at 1.5–2.5 ft tall; it blooms Jun through Aug.
- Full sun
- Dry
- 1.5–2.5 ft
- Blooms Jun–Aug
Kentucky · Zones 6–7
Native Plants for Clay Soil in Kentucky
Native plants that root happily into heavy clay — the dense, slow-draining soil that defeats so many garden-center perennials. For Kentucky, the right natives are shaped by Bluegrass, Cumberland Plateau & Pennyroyal and a humid, four-season climate. Every species below, from Butterfly Weed and Black-Eyed Susan to the rest of the list, is genuinely native to Kentucky and the wider flora of the Southeast and hardy through zones 6–7. 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 Kentucky
Each one native to your region and hardy in zones 6–7 · see this collection in other states.
Black-Eyed Susan
Rudbeckia hirta
Punches its roots through dense clay where garden-center perennials sulk, at 1.5–3 ft tall; it blooms Jun through Sep.
- Full–part sun
- Dry–average
- 1.5–3 ft
- Blooms Jun–Sep
Common Yarrow
Achillea millefolium
Punches its roots through dense clay where garden-center perennials sulk, at 1.5–3 ft tall, flowering as it blooms May through Aug.
- Full sun
- Dry–average
- 1.5–3 ft
- Blooms May–Aug
Arrowwood Viburnum
Viburnum dentatum
Roots straight into heavy clay and even improves it, standing 6–10 ft tall — it flowers in May and Jun.
- Sun to shade
- Average–wet
- 6–10 ft
- Blooms May–Jun
Foxglove Beardtongue
Penstemon digitalis
At home in the dense clay that defeats most perennials, 2–4 ft tall — it flowers in May and Jun.
- Full–part sun
- Dry–average
- 2–4 ft
- Blooms May–Jun
Golden Alexanders
Zizia aurea
A clay-buster — thrives in the slow-draining ground, 1.5–2.5 ft tall, flowering as it blooms Apr through Jun.
- Full–part sun
- Average–wet
- 1.5–2.5 ft
- Blooms Apr–Jun
Culver's Root
Veronicastrum virginicum
Punches its roots through dense clay where garden-center perennials sulk, at 3–5 ft tall; it blooms Jun through Aug.
- Full–part sun
- Average–wet
- 3–5 ft
- Blooms Jun–Aug
Cup Plant
Silphium perfoliatum
At home in the dense clay that defeats most perennials, 5–8 ft tall, flowering as it blooms Jul through Sep.
- Full–part sun
- Average–wet
- 5–8 ft
- Blooms Jul–Sep
Purple Coneflower
Echinacea purpurea
Punches its roots through dense clay where garden-center perennials sulk, at 2–4 ft tall, flowering as it blooms Jun through Sep.
- Full–part sun
- Dry–average
- 2–4 ft
- Blooms Jun–Sep
Crossvine
Bignonia capreolata
At home in the dense clay that defeats most perennials, 25–50 ft tall, flowering as it flowers in Apr and May.
- Full–part sun
- Dry–average
- 25–50 ft
- Blooms Apr–May
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
Trumpet Honeysuckle
Lonicera sempervirens
Roots straight into heavy clay and even improves it, standing 8–15 ft tall — it blooms Apr through Sep.
- Full–part sun
- Dry–average
- 8–15 ft
- Blooms Apr–Sep
Swamp Milkweed
Asclepias incarnata
Punches its roots through dense clay where garden-center perennials sulk, at 3–4 ft tall — it flowers in Jul and Aug.
- Full–part sun
- Average–wet
- 3–4 ft
- Blooms Jul–Aug
Dense Blazing Star
Liatris spicata
Roots straight into heavy clay and even improves it, standing 2–4 ft tall, flowering as it flowers in Jul and Aug.
- Full sun
- Average–wet
- 2–4 ft
- Blooms Jul–Aug
Aromatic Aster
Symphyotrichum oblongifolium
Roots straight into heavy clay and even improves it, standing 1.5–2.5 ft tall — it blooms Sep through Nov.
- Full sun
- Dry
- 1.5–2.5 ft
- Blooms Sep–Nov
Wild Bergamot
Monarda fistulosa
Roots straight into heavy clay and even improves it, standing 2–4 ft tall, and it blooms Jun through Aug.
- Full–part sun
- Dry–average
- 2–4 ft
- Blooms Jun–Aug
Eastern Redbud
Cercis canadensis
At home in the dense clay that defeats most perennials, 20–30 ft tall; it flowers in Mar and Apr.
- Full–part sun
- Dry–average
- 20–30 ft
- Blooms Mar–Apr
Obedient Plant
Physostegia virginiana
At home in the dense clay that defeats most perennials, 2–4 ft tall — it flowers in Aug and Sep.
- Full–part sun
- Average–wet
- 2–4 ft
- Blooms Aug–Sep
Maximilian Sunflower
Helianthus maximiliani
At home in the dense clay that defeats most perennials, 5–8 ft tall; it blooms Aug through Oct.
- Full sun
- Dry–average
- 5–8 ft
- Blooms Aug–Oct
Great Blue Lobelia
Lobelia siphilitica
Punches its roots through dense clay where garden-center perennials sulk, at 2–3 ft tall; it flowers in Aug and Sep.
- Full–part sun
- Average–wet
- 2–3 ft
- Blooms Aug–Sep
Prairie Blazing Star
Liatris pycnostachya
Punches its roots through dense clay where garden-center perennials sulk, at 3–5 ft tall — it flowers in Jul and Aug.
- Full sun
- Dry–average
- 3–5 ft
- Blooms Jul–Aug
Turk's Cap
Malvaviscus arboreus var. drummondii
At home in the dense clay that defeats most perennials, 2–5 ft tall; it blooms May through Oct.
- Sun to shade
- Dry–average
- 2–5 ft
- Blooms May–Oct
Buttonbush
Cephalanthus occidentalis
A clay-buster — thrives in the slow-draining ground, 5–10 ft tall, flowering as it blooms Jun through Aug.
- Full–part sun
- Average–wet
- 5–10 ft
- Blooms Jun–Aug
Serviceberry
Amelanchier canadensis
Roots straight into heavy clay and even improves it, standing 15–25 ft tall, and it flowers in Apr and May.
- Full–part sun
- Average–wet
- 15–25 ft
- Blooms Apr–May
26 more also qualify: New England Aster, American Beautyberry, Spotted Joe-Pye Weed, Cardinal Flower, Winterberry, Scarlet Beebalm, Smooth Hydrangea, Stiff Goldenrod, Blue Vervain, Rattlesnake Master, Fragrant Sumac, Sideoats Grama, Common Boneset, Red-Twig Dogwood, American Elderberry, Virginia Creeper, Ninebark, Common Milkweed, Inkberry Holly, Compass Plant, Spicebush, Big Bluestem, Switchgrass, Cinnamon Fern, Little Bluestem, Indian Grass.
Sourcing
Where to find these in Kentucky
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.