Marsh Cinquefoil vs Cow Parsnip - TreeTime.ca

Marsh Cinquefoil vs Cow Parsnip

Comarum palustre

Heracleum maximum

CUSTOM GROW

CUSTOM GROW

Marsh Cinquefoil
Cow Parsnip

Marsh Cinquefoil is a native perennial wetland plant with striking reddish-purple, star-shaped flowers. They bloom in early to mid-summer, providing nectar for bees, flies, and other pollinators. Beyond its summer blooms, the foliage turns red in autumn, adding seasonal interest to wetland landscapes.

Common in wetlands, pond margins, and wet meadows, Marsh Cinquefoil spreads by rhizomes to form colonies or patches that contribute to shoreline stabilization. It thrives in nutrient-poor, saturated soils where many other plants struggle, making it valuable in challenging wetland conditions. With its ecological function and ornamental appeal, it is well-suited for wetland plantings, ecological restoration, and naturalized projects.

Cow Parsnip is a native perennial plant that grows tall with very large leaves and broad clusters of white flowers. It grows quickly, providing quick cover in disturbed areas.
Its flowers are large and plentiful, providing nectar and pollen for bees, flies, and butterflies. Its seeds are eaten by birds and small mammals. The young shoots of the plant are edible, but care must be taken as the sap of this plant can cause skin irritation (see below).
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.

Marsh Cinquefoil Quick Facts

Cow Parsnip Quick Facts

Zone: 1b
Zone: 2a
Height: 0.5 m (1.5 ft)
Height: 1.8 m (6 ft)
Spread: 0.3 m (1.0 ft)
Spread: 1.2 m (4 ft)
Light: partial shade, full sun
Light: partial shade, full sun
Moisture: wet
Moisture: normal, wet
Growth rate: fast
Growth rate: fast
Life span: short
Life span: short
Growth form: ascending to upright
Growth form: upright
Spreading: seeds - medium, rhizomes - medium
Spreading: seeds - low


Toxicity: sap causes skin irritation
Foliage: very large, palmate leaves
Flowers: dark red/maroon, star-shaped
Flowers: large clusters of white flowers
Bloom time: summer
Bloom time: 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, NU, PE
Native to: AB, BC, SK, MB, ON, QC, NS, NB, NL, YT, NT, PE
Other Names: marsh five fingers, purple cinquefoil, purple marshlocks
Other Names: american cow parsnip, common cow parsnip