Cow Parsnip vs Prairie Crocus - TreeTime.ca

Cow Parsnip vs Prairie Crocus

Heracleum maximum

Pulsatilla nuttalliana (Anemone patens)

CUSTOM GROW

NOT AVAILABLE THIS SEASON - MIGHT RETURN

Cow Parsnip
Prairie Crocus

Cow Parsnip is a native perennial wildflower known for its tall growth, very large leaves, and broad clusters of white flowers. The abundant blossoms provide nectar and pollen for a wide variety of pollinators, including bees and butterflies. Birds and small mammals feed on its seeds, while the foliage serves as a larval host for certain butterfly species.

Cow Parsnip is often among the first native perennials to establish in disturbed or open sites. It typically grows in moist meadows, along streambanks, forest edges, and roadsides. Although usually a short-lived perennial or biennial, it readily self-seeds and maintains strong populations where conditions are favorable.

Cow Parsnip is the only native Heracleum in North America and should not be confused with the highly invasive Giant Hogweed (H. mantegazzianum).

Note: The sap of the Cow Parsnip can cause phytodermatitis when exposed to ultraviolet light (sunlight). This can cause rashes or even burns. Care should be taken if pruning or handling this plant.

Prairie Crocus is a native perennial wildflower that is often considered one of the first signs of spring. The flowers can range from purple, pale blue, to white and often appear before the snow has fully melted. It can bloom a month earlier than other spring flowers, providing an early source of pollen for a variety of pollinators.

The plant is covered in woolly white hairs, including the finely divided leaves, giving them a silvery appearance. Prairie Crocus leaves do not fully emerge until after it has bloomed. The spent blooms transform into fluffy, feathery seed heads. During the hot summer months, the Prairie Crocus goes dormant and will repeat its life cycle the following spring.

The Prairie Crocus is Manitoba’s provincial flower.

Cow Parsnip Quick Facts

Prairie Crocus Quick Facts

Zone: 2a
Zone: 1b
Height: 1.8 m (6 ft)
Height: 0.2 m (0.5 ft)
Spread: 1.2 m (4 ft)
Spread: 0.2 m (0.5 ft)
Light: partial shade, full sun
Light: full sun
Moisture: normal, wet
Moisture: dry, normal
Growth rate: fast
Growth rate: fast
Life span: short
Life span: short
Growth form: upright
Growth form: low growing, clump-forming
Spreading: seeds - low
Spreading: seeds - medium, rhizomes - low

Toxicity: sap causes skin irritation

Toxicity: all parts toxic if eaten, sap can irritate skin
Foliage: very large, palmate leaves
Foliage: fuzzy, finely divided leaves
Flowers: large clusters of white flowers
Flowers: pale purple, cup-shaped
Bloom time: spring to early summer
Bloom time: early spring
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no


Native to: AB, BC, SK, MB, ON, QC, NS, NB, NL, YT, NT, PE
Native to: AB, BC, SK, MB, ON, YT, NT, NU
Other Names: american cow parsnip, common cow parsnip
Other Names: american pasqueflower, crocus anemone, pasqueflower, prairie pasqueflower, prairie smoke