Prairie Blazing Star
Liatris pycnostachya
Punches its roots through dense clay where garden-center perennials sulk, at 3–5 ft tall, and it flowers in Jul and Aug.
- Full sun
- Dry–average
- 3–5 ft
- Blooms Jul–Aug
Ohio · Zones 5–7
Native Plants for Clay Soil in Ohio
Native plants that root happily into heavy clay — the dense, slow-draining soil that defeats so many garden-center perennials. Every species here is genuinely native to Ohio and the wider flora of the Midwest and hardy through zones 5–7 — proven performers for Ohio's humid continental climate across Eastern Corn Belt & Allegheny Plateau, not a generic list. Local standouts include Prairie Blazing Star and Smooth Hydrangea. 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
47 native species for Ohio
Each one native to your region and hardy in zones 5–7 · see this collection in other states.
Smooth Hydrangea
Hydrangea arborescens
Punches its roots through dense clay where garden-center perennials sulk, at 3–5 ft tall — it blooms Jun through Aug.
- Part shade
- Average
- 3–5 ft
- Blooms Jun–Aug
Common Yarrow
Achillea millefolium
At home in the dense clay that defeats most perennials, 1.5–3 ft tall, flowering as it blooms May through Aug.
- Full sun
- Dry–average
- 1.5–3 ft
- Blooms May–Aug
Great Blue Lobelia
Lobelia siphilitica
A clay-buster — thrives in the slow-draining ground, 2–3 ft tall, flowering as it flowers in Aug and Sep.
- Full–part sun
- Average–wet
- 2–3 ft
- Blooms Aug–Sep
Aromatic Aster
Symphyotrichum oblongifolium
A clay-buster — thrives in the slow-draining ground, 1.5–2.5 ft tall, and it blooms Sep through Nov.
- Full sun
- Dry
- 1.5–2.5 ft
- Blooms Sep–Nov
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
Trumpet Honeysuckle
Lonicera sempervirens
Punches its roots through dense clay where garden-center perennials sulk, at 8–15 ft tall, flowering as it blooms Apr through Sep.
- Full–part sun
- Dry–average
- 8–15 ft
- Blooms Apr–Sep
New England Aster
Symphyotrichum novae-angliae
Roots straight into heavy clay and even improves it, standing 3–5 ft tall, flowering as it flowers in Sep and Oct.
- Full–part sun
- Average–wet
- 3–5 ft
- Blooms Sep–Oct
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
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
Winterberry
Ilex verticillata
Roots straight into heavy clay and even improves it, standing 5–10 ft tall, and it flowers in Jun and Jul.
- Full–part sun
- Average–wet
- 5–10 ft
- Blooms Jun–Jul
Golden Alexanders
Zizia aurea
Punches its roots through dense clay where garden-center perennials sulk, at 1.5–2.5 ft tall, and it blooms Apr through Jun.
- Full–part sun
- Average–wet
- 1.5–2.5 ft
- Blooms Apr–Jun
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
Scarlet Beebalm
Monarda didyma
At home in the dense clay that defeats most perennials, 2.5–4 ft tall; it flowers in Jul and Aug.
- Full–part sun
- Average–wet
- 2.5–4 ft
- Blooms Jul–Aug
Maximilian Sunflower
Helianthus maximiliani
Punches its roots through dense clay where garden-center perennials sulk, at 5–8 ft tall; it blooms Aug through Oct.
- Full sun
- Dry–average
- 5–8 ft
- Blooms Aug–Oct
Purple Coneflower
Echinacea purpurea
At home in the dense clay that defeats most perennials, 2–4 ft tall, flowering as it blooms Jun through Sep.
- Full–part sun
- Dry–average
- 2–4 ft
- Blooms Jun–Sep
Serviceberry
Amelanchier canadensis
Punches its roots through dense clay where garden-center perennials sulk, at 15–25 ft tall; it flowers in Apr and May.
- Full–part sun
- Average–wet
- 15–25 ft
- Blooms Apr–May
Short-Toothed Mountain Mint
Pycnanthemum muticum
A clay-buster — thrives in the slow-draining ground, 2–3 ft tall — it blooms Jul through Sep.
- Full–part sun
- Dry–average
- 2–3 ft
- Blooms Jul–Sep
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
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
Black-Eyed Susan
Rudbeckia hirta
At home in the dense clay that defeats most perennials, 1.5–3 ft tall — it blooms Jun through Sep.
- Full–part sun
- Dry–average
- 1.5–3 ft
- Blooms Jun–Sep
Cardinal Flower
Lobelia cardinalis
Punches its roots through dense clay where garden-center perennials sulk, at 2–4 ft tall; it blooms Jul through Sep.
- Full–part sun
- Average–wet
- 2–4 ft
- Blooms Jul–Sep
Arrowwood Viburnum
Viburnum dentatum
At home in the dense clay that defeats most perennials, 6–10 ft tall, flowering as it flowers in May and Jun.
- Sun to shade
- Average–wet
- 6–10 ft
- Blooms May–Jun
Spotted Joe-Pye Weed
Eutrochium maculatum
Roots straight into heavy clay and even improves it, standing 4–7 ft tall; it blooms Jul through Sep.
- Full–part sun
- Average–wet
- 4–7 ft
- Blooms Jul–Sep
23 more also qualify: Obedient Plant, Culver's Root, Dense Blazing Star, Wild Bergamot, Red-Twig Dogwood, Compass Plant, Inkberry Holly, Rattlesnake Master, Stiff Goldenrod, Fragrant Sumac, Ninebark, American Elderberry, Common Milkweed, Blue Vervain, Spicebush, Common Boneset, Sideoats Grama, Virginia Creeper, Indian Grass, Switchgrass, Little Bluestem, Big Bluestem, Cinnamon Fern.
Sourcing
Where to find these in Ohio
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.