Cow Parsnip vs Early Blue Violet - TreeTime.ca

Cow Parsnip vs Early Blue Violet

Heracleum maximum

Viola adunca

CUSTOM GROW

NOT AVAILABLE THIS SEASON - MIGHT RETURN

Cow Parsnip
Early Blue Violet

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.

Early Blue Violet is a low-growing native perennial wildflower valued for its striking early-spring blooms. The flowers range in color from vibrant blue to deep violet, often marked with pale highlights and fine white hairs. They provide an important early nectar source for pollinators and serve as a host plant for several fritillary butterfly species.

It spreads by both seed and rhizomes, gradually forming small colonies. Its dark green, heart-shaped leaves add ornamental appeal, and the plant shows some resistance to deer browsing. Early Blue Violet is well-suited to naturalization projects and pollinator-friendly gardens, and has also been used in coastal butterfly habitat restoration in the Pacific Northwest.

Cow Parsnip Quick Facts

Early Blue Violet Quick Facts

Zone: 2a
Zone: 2a
Height: 1.8 m (6 ft)
Height: 0.1 m (0.3 ft)
Spread: 1.2 m (4 ft)
Spread: 0.2 m (0.5 ft)
Light: partial shade, full sun
Light: partial shade, 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 - medium
Maintenance: medium

Toxicity: sap causes skin irritation

Toxicity: rhizomes, fruit, seed poisonous to humans
Foliage: very large, palmate leaves
Flowers: large clusters of white flowers
Flowers: purple to blue-violet
Bloom time: spring to early summer
Bloom time: mid spring to early summer
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, QC, NS, NB, YT, NT
Other Names: american cow parsnip, common cow parsnip
Other Names: dog violet, hookedspur violet, sand violet, western blue violet