Swamp Milkweed
Asclepias incarnata
For the wet center of a rain garden and damp low spots, happy in clay and loam soil, where it flowers in Jul and Aug.
- Full–part sun
- Average–wet
- 3–4 ft
- Blooms Jul–Aug
Moisture-loving natives for rain gardens, pond edges, downspout basins, and the low spots that stay soggy after a storm. Every species here is genuinely native to New Jersey and the wider flora of the Mid-Atlantic and hardy through zones 6–7 — proven performers for New Jersey's humid, four-season climate across Pine Barrens & Piedmont, not a generic list. Local standouts include Swamp Milkweed and Serviceberry. A rain garden catches roof and driveway runoff and lets it soak in instead of rushing to the storm drain, and these natives are built for that boom-and-bust of flood then dry. Put the most water-tolerant species in the wet center and the merely moisture-loving ones up on the sloped edges. Once established they handle both the standing water and the dry weeks between storms.
Each one native to your region and hardy in zones 6–7 · see this collection in other states.
Asclepias incarnata
For the wet center of a rain garden and damp low spots, happy in clay and loam soil, where it flowers in Jul and Aug.
Amelanchier canadensis
Happy in the wet center of a rain garden and ground that stays soggy after a storm, for clay and loam ground, where it flowers in Apr and May.
Monarda didyma
Happy in the wet center of a rain garden and ground that stays soggy after a storm, 2.5–4 ft tall, where it flowers in Jul and Aug.
Mertensia virginica
Happy in the wet center of a rain garden and ground that stays soggy after a storm, good through zone 8, where it blooms Mar through May.
Lobelia siphilitica
Built for the wet center of a rain garden and the boom-and-bust of storm runoff, spreading 12–18 in, where it flowers in Aug and Sep.
Zizia aurea
Built for the wet center of a rain garden and the boom-and-bust of storm runoff, spreading 1–2 ft, where it blooms Apr through Jun.
Lobelia cardinalis
Takes the wet center of a rain garden through flood and dry spell alike, for clay and loam ground, where it blooms Jul through Sep.
Cephalanthus occidentalis
Takes the wet center of a rain garden through flood and dry spell alike, 4–8 ft wide, where it blooms Jun through Aug.
Ilex verticillata
For the wet center of a rain garden and damp low spots, hardy in zones 3–9, where it flowers in Jun and Jul.
Physostegia virginiana
Happy in the wet center of a rain garden and ground that stays soggy after a storm, cold-hardy to zone 3, where it flowers in Aug and Sep.
Silphium perfoliatum
Happy in the wet center of a rain garden and ground that stays soggy after a storm, for clay and loam ground, where it blooms Jul through Sep.
Eutrochium maculatum
Happy in the wet center of a rain garden and ground that stays soggy after a storm, good through zone 8, where it blooms Jul through Sep.
Liatris spicata
Built for the wet center of a rain garden and the boom-and-bust of storm runoff, 12–18 in wide, where it flowers in Jul and Aug.
Viburnum dentatum
For the wet center of a rain garden and damp low spots, cold-hardy to zone 3, where it flowers in May and Jun.
Symphyotrichum novae-angliae
Happy in the wet center of a rain garden and ground that stays soggy after a storm, reaching 3–5 ft, where it flowers in Sep and Oct.
Veronicastrum virginicum
Built for the wet center of a rain garden and the boom-and-bust of storm runoff, 1.5–2 ft wide, where it blooms Jun through Aug.
Cornus sericea
Happy in the wet center of a rain garden and ground that stays soggy after a storm, for clay and loam ground, where it flowers in May and Jun.
Verbena hastata
Happy in the wet center of a rain garden and ground that stays soggy after a storm, spreading 1.5–2.5 ft, where it blooms Jul through Sep.
Ilex glabra
Happy in the wet center of a rain garden and ground that stays soggy after a storm, cold-hardy to zone 4, where it flowers in May and Jun.
Eupatorium perfoliatum
Built for the wet center of a rain garden and the boom-and-bust of storm runoff, happy in clay and loam soil, where it flowers in Aug and Sep.
Physocarpus opulifolius
Takes the wet center of a rain garden through flood and dry spell alike, spreading 5–10 ft, where it flowers in May and Jun.
Lindera benzoin
For the wet center of a rain garden and damp low spots, for clay and loam ground, where it flowers in Mar and Apr.
Sambucus canadensis
Takes the wet center of a rain garden through flood and dry spell alike, hardy in zones 3–9, where it flowers in Jun and Jul.
Andropogon gerardii
Takes the wet center of a rain garden through flood and dry spell alike, good through zone 9.
2 more also qualify: Switchgrass, Cinnamon Fern.
Seed packets, plugs, and starter plants for many of these species ship to your door.
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