American Cow-parsnip
Heracleum lanatum
Last reviewed: June 2026
Light
part sun
Water
medium
Size
36"–96" H × 24"–48" W
Bloom
Jun, Jul, Aug
Native to
VT
Pollinators
bees, beetles, flies
Browse plants for this ecoregion
American cow-parsnip is a tall, dramatic native perennial with large umbrella-shaped white flower clusters and broad, maple-like leaves. This robust plant can reach up to 8 feet tall and creates a bold presence in partially shaded, moist areas. It blooms from June through August with impressive flower heads that can span over a foot across.
In an HOA neighborhood
American Cow-parsnip takes more care to keep looking intentional in a front yard. Maintenance level: low. Consider it for backyard or mid-zone beds rather than the street edge.
Works well in: backyard only.
- Extremely large size appears overgrown
- Wild, unmanicured appearance
- Can be confused with invasive giant hogweed
Wildlife value
The large flower clusters attract numerous pollinators including native bees, beetles, and flies during its long summer bloom period. Its substantial size and extended flowering make it particularly valuable for supporting diverse pollinator populations.
Native range data from the USDA PLANTS Database and regional native plant society lists. Pollinator and host plant associations compiled from GBIF, iNaturalist, and published ecological literature.
Does American Cow-parsnip fit your yard? Open it in Pollinator Patch to check it against your sun, soil, and HOA-conscious filters.