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
Louisiana · Zones 8–9
Native Plants for Clay Soil in Louisiana
Native plants that root happily into heavy clay — the dense, slow-draining soil that defeats so many garden-center perennials. For Louisiana, the right natives are shaped by Mississippi Delta & Gulf Coast Prairie and a hot, humid subtropical climate. Every species below, from Butterfly Weed and Scarlet Beebalm to the rest of the list, is genuinely native to Louisiana and the wider flora of the Southeast and hardy through zones 8–9. 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
49 native species for Louisiana
Each one native to your region and hardy in zones 8–9 · see this collection in other states.
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
Black-Eyed Susan
Rudbeckia hirta
Punches its roots through dense clay where garden-center perennials sulk, at 1.5–3 ft tall, flowering as it blooms Jun through Sep.
- Full–part sun
- Dry–average
- 1.5–3 ft
- Blooms Jun–Sep
American Beautyberry
Callicarpa americana
At home in the dense clay that defeats most perennials, 4–7 ft tall — it flowers in Jun and Jul.
- Full–part sun
- Dry–average
- 4–7 ft
- Blooms Jun–Jul
Smooth Hydrangea
Hydrangea arborescens
Roots straight into heavy clay and even improves it, standing 3–5 ft tall, flowering as it blooms Jun through Aug.
- Part shade
- Average
- 3–5 ft
- Blooms Jun–Aug
Spotted Joe-Pye Weed
Eutrochium maculatum
A clay-buster — thrives in the slow-draining ground, 4–7 ft tall, and it blooms Jul through Sep.
- Full–part sun
- Average–wet
- 4–7 ft
- Blooms Jul–Sep
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
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
Purple Coneflower
Echinacea purpurea
Punches its roots through dense clay where garden-center perennials sulk, at 2–4 ft tall — it blooms Jun through Sep.
- Full–part sun
- Dry–average
- 2–4 ft
- Blooms Jun–Sep
Obedient Plant
Physostegia virginiana
A clay-buster — thrives in the slow-draining ground, 2–4 ft tall, and it flowers in Aug and Sep.
- Full–part sun
- Average–wet
- 2–4 ft
- Blooms Aug–Sep
Dense Blazing Star
Liatris spicata
Roots straight into heavy clay and even improves it, standing 2–4 ft tall, and it flowers in Jul and Aug.
- Full sun
- Average–wet
- 2–4 ft
- Blooms Jul–Aug
Serviceberry
Amelanchier canadensis
A clay-buster — thrives in the slow-draining ground, 15–25 ft tall; it flowers in Apr and May.
- Full–part sun
- Average–wet
- 15–25 ft
- Blooms Apr–May
Common Yarrow
Achillea millefolium
A clay-buster — thrives in the slow-draining ground, 1.5–3 ft tall, and it blooms May through Aug.
- Full sun
- Dry–average
- 1.5–3 ft
- Blooms May–Aug
New England Aster
Symphyotrichum novae-angliae
A clay-buster — thrives in the slow-draining ground, 3–5 ft tall, flowering as it flowers in Sep and Oct.
- Full–part sun
- Average–wet
- 3–5 ft
- Blooms Sep–Oct
Short-Toothed Mountain Mint
Pycnanthemum muticum
A clay-buster — thrives in the slow-draining ground, 2–3 ft tall, flowering as 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, and it blooms Apr through Sep.
- Full–part sun
- Dry–average
- 8–15 ft
- Blooms Apr–Sep
Golden Alexanders
Zizia aurea
At home in the dense clay that defeats most perennials, 1.5–2.5 ft tall; it blooms Apr through Jun.
- Full–part sun
- Average–wet
- 1.5–2.5 ft
- Blooms Apr–Jun
Arrowwood Viburnum
Viburnum dentatum
At home in the dense clay that defeats most perennials, 6–10 ft tall; it flowers in May and Jun.
- Sun to shade
- Average–wet
- 6–10 ft
- Blooms May–Jun
Culver's Root
Veronicastrum virginicum
Punches its roots through dense clay where garden-center perennials sulk, at 3–5 ft tall, and it blooms Jun through Aug.
- Full–part sun
- Average–wet
- 3–5 ft
- Blooms Jun–Aug
Cup Plant
Silphium perfoliatum
Punches its roots through dense clay where garden-center perennials sulk, at 5–8 ft tall; it blooms Jul through Sep.
- Full–part sun
- Average–wet
- 5–8 ft
- Blooms Jul–Sep
Cardinal Flower
Lobelia cardinalis
A clay-buster — thrives in the slow-draining ground, 2–4 ft tall, and it blooms Jul through Sep.
- Full–part sun
- Average–wet
- 2–4 ft
- Blooms Jul–Sep
Wild Bergamot
Monarda fistulosa
A clay-buster — thrives in the slow-draining ground, 2–4 ft tall — it blooms Jun through Aug.
- Full–part sun
- Dry–average
- 2–4 ft
- Blooms Jun–Aug
Great Blue Lobelia
Lobelia siphilitica
A clay-buster — thrives in the slow-draining ground, 2–3 ft tall — it flowers in Aug and Sep.
- Full–part sun
- Average–wet
- 2–3 ft
- Blooms Aug–Sep
Winterberry
Ilex verticillata
A clay-buster — thrives in the slow-draining ground, 5–10 ft tall — it flowers in Jun and Jul.
- Full–part sun
- Average–wet
- 5–10 ft
- Blooms Jun–Jul
25 more also qualify: Foxglove Beardtongue, Prairie Blazing Star, Swamp Milkweed, Buttonbush, Eastern Redbud, Maximilian Sunflower, Aromatic Aster, Common Boneset, Compass Plant, Sideoats Grama, Rattlesnake Master, Virginia Creeper, Spicebush, Common Milkweed, Fragrant Sumac, Stiff Goldenrod, Inkberry Holly, Blue Vervain, Blue Grama, American Elderberry, Switchgrass, Indian Grass, Little Bluestem, Cinnamon Fern, Big Bluestem.
Sourcing
Where to find these in Louisiana
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.