South Dakota Native Plant Research
Heracleum maximum

Scientific Name

Heracleum maximum


Download Seed: Obovate, flattened fruit (seed) of cow parsnip, 7-12 mm long. Oils inside give off a strong orange smell. (70 KB)

Download Vegetative: The leaflets are 10-40 cm long. (134 KB)

Download Flowering: The white flowers collectively make up umbels that are 10-20 cm across. (110 KB)

Download Fruiting: The 8-12 mm long fruit is very flat. (130 KB)

Family Name


Common Name

Cow parsnip

Horticulture Notes

Seed Collection: Collect seed in July
Germination: Warm-cold stratification
Vegetative Propagation:
Soils: Sandy, loam, gravelly, or clay
Light: Full sun
Water: Prefers moist conditions

Heracleum maximum