Cow Parsnip, Heracleum Seed
Cow Parsnip Heracleum Seed
- Late Spring-Early Summer, Early-Mid Summer bloom season
- Full Sun, Partial exposure
- Medium, Medium to Wet soil moisture
- 24–36 inches plant spacing
Key Attributes
About Cow Parsnip, Heracleum Seed
Cow Parsnip (Heracleum maximum) is a distinctive North American native plant. Broad leaves and large white umbels give this imposing biennial a strong presence in moist meadows and woodland edges. It matures at approximately 96 inches tall and flowers from late spring to early summer through early to mid summer. Plant it in full sun to partial shade, in medium to medium-wet conditions, with loamy soil, clay soil or wet soil. Space plants 24–36 inches apart for healthy growth and airflow.
Growing details
Plant profile
Seed & variety
Before Planting
Planting
Watering
Fertilizer
Harvesting
Tips
Pests & Diseases
Provide suitable spacing and airflow, water near the soil surface, and remove heavily affected debris if leaf spots, mildew, or stem decline appear. Avoid keeping crowns continuously saturated unless the species requires wet conditions.
Inspect seedlings and young growth for slugs, chewing insects, and sap-feeding pests. Healthy established native plants often tolerate light feeding; identify the pest before using the least disruptive labeled control.
Native States & Regions
- Alabama
- Alaska
- Arizona
- California
- Colorado
- Connecticut
- Delaware
- Georgia
- Idaho
- Illinois
- Indiana
- Iowa
- Kansas
- Kentucky
- Maine
- Maryland
- Massachusetts
- Michigan
- Minnesota
- Missouri
- Montana
- Nebraska
- Nevada
- New Hampshire
- New Jersey
- New Mexico
- New York
- North Carolina
- North Dakota
- Ohio
- Oregon
- Pennsylvania
- Rhode Island
- South Dakota
- Tennessee
- Utah
- Vermont
- Virginia
- Washington
- West Virginia
- Wisconsin
- Wyoming
Native regions: Widespread Native
Cow Parsnip Heracleum Native Range Map
Native range describes natural occurrence, not the origin of this seed lot or every location where a plant can be grown.
Alaska and Hawaii are shown as insets. State-level range does not mean a plant occurs throughout every part of that state.
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