Anthony Waterer Spiraea vs Cow Parsnip - TreeTime.ca

Anthony Waterer Spiraea vs Cow Parsnip

Heracleum maximum

Spiraea japonica Anthony Waterer

CUSTOM GROW

CUSTOM GROW

Cow Parsnip
Anthony Waterer Spiraea

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.

Anthony Waterer Spiraea is a low maintenance shrub with a dwarf, rounded form. In spring and summer rosy pink blooms emerge against green foliage. Its tolerance of a variety of well-drained soils makes it an ideal foundation, landscaping, or border plant.

If deer and rabbit are an issue on your property, consider planting Anthony Waterer Spiraea for its deer/rabbit resistance. Due to its compact form, minimal pruning is required.

Cow Parsnip Quick Facts

Anthony Waterer Spiraea Quick Facts

Zone: 2a
Zone: 3a
Height: 1.8 m (6 ft)
Height: 0.9 m (3 ft)
Spread: 1.2 m (4 ft)
Spread: 1.2 m (4 ft)
Light: partial shade, full sun
Light: full sun
Moisture: normal, wet
Moisture: normal, wet
Growth rate: fast
Growth rate: medium
Life span: short
Life span: short
Growth form: upright
Spreading: seeds - low
Suckering: low

Toxicity: sap causes skin irritation

Foliage: very large, palmate leaves
Fall colour: orange to red
Flowers: large clusters of white flowers
Flowers: bright pink flowers
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, PE
Other Names: american cow parsnip, common cow parsnip