Purple Coneflower
Echinacea purpurea
Roots straight into heavy clay and even improves it, standing 2–4 ft tall; it blooms Jun through Sep.
- Full–part sun
- Dry–average
- 2–4 ft
- Blooms Jun–Sep
Vermont · Zones 3–5
Native Plants for Clay Soil in Vermont
Native plants that root happily into heavy clay — the dense, slow-draining soil that defeats so many garden-center perennials. For Vermont, the right natives are shaped by Green Mountains & Champlain Valley and a cold, humid continental climate. Every species below, from Purple Coneflower and Arrowwood Viburnum to the rest of the list, is genuinely native to Vermont and the wider flora of the Northeast and hardy through zones 3–5. 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
39 native species for Vermont
Each one native to your region and hardy in zones 3–5 · see this collection in other states.
Arrowwood Viburnum
Viburnum dentatum
A clay-buster — thrives in the slow-draining ground, 6–10 ft tall; it flowers in May and Jun.
- Sun to shade
- Average–wet
- 6–10 ft
- Blooms May–Jun
Swamp Milkweed
Asclepias incarnata
Roots straight into heavy clay and even improves it, standing 3–4 ft tall; it flowers in Jul and Aug.
- Full–part sun
- Average–wet
- 3–4 ft
- Blooms Jul–Aug
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
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
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
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
Culver's Root
Veronicastrum virginicum
Roots straight into heavy clay and even improves it, standing 3–5 ft tall, and it blooms Jun through Aug.
- Full–part sun
- Average–wet
- 3–5 ft
- Blooms Jun–Aug
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
Winterberry
Ilex verticillata
Roots straight into heavy clay and even improves it, standing 5–10 ft tall; it flowers in Jun and Jul.
- Full–part sun
- Average–wet
- 5–10 ft
- Blooms Jun–Jul
Butterfly Weed
Asclepias tuberosa
Punches its roots through dense clay where garden-center perennials sulk, at 1.5–2.5 ft tall, flowering as it blooms Jun through Aug.
- Full sun
- Dry
- 1.5–2.5 ft
- Blooms Jun–Aug
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
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
Foxglove Beardtongue
Penstemon digitalis
At home in the dense clay that defeats most perennials, 2–4 ft tall, flowering as it flowers in May and Jun.
- Full–part sun
- Dry–average
- 2–4 ft
- Blooms May–Jun
Serviceberry
Amelanchier canadensis
At home in the dense clay that defeats most perennials, 15–25 ft tall — it flowers in Apr and May.
- Full–part sun
- Average–wet
- 15–25 ft
- Blooms Apr–May
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
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
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
Scarlet Beebalm
Monarda didyma
Roots straight into heavy clay and even improves it, standing 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
Common Yarrow
Achillea millefolium
At home in the dense clay that defeats most perennials, 1.5–3 ft tall, and it blooms May through Aug.
- Full sun
- Dry–average
- 1.5–3 ft
- Blooms May–Aug
Buttonbush
Cephalanthus occidentalis
At home in the dense clay that defeats most perennials, 5–10 ft tall, flowering as it blooms Jun through Aug.
- Full–part sun
- Average–wet
- 5–10 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
Obedient Plant
Physostegia virginiana
Punches its roots through dense clay where garden-center perennials sulk, at 2–4 ft tall; it flowers in Aug and Sep.
- Full–part sun
- Average–wet
- 2–4 ft
- Blooms Aug–Sep
New England Aster
Symphyotrichum novae-angliae
Punches its roots through dense clay where garden-center perennials sulk, at 3–5 ft tall, flowering as it flowers in Sep and Oct.
- Full–part sun
- Average–wet
- 3–5 ft
- Blooms Sep–Oct
15 more also qualify: Ninebark, American Elderberry, Virginia Creeper, Common Milkweed, Red-Twig Dogwood, Common Boneset, Blue Vervain, Fragrant Sumac, Spicebush, Inkberry Holly, Switchgrass, Little Bluestem, Big Bluestem, Cinnamon Fern, Indian Grass.
Sourcing
Where to find these in Vermont
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.