Annabelle Hydrangea vs Cow Parsnip - TreeTime.ca

Annabelle Hydrangea vs Cow Parsnip

Hydrangea arborescens Annabelle

Heracleum maximum

CUSTOM GROW

Annabelle Hydrangea
Cow Parsnip

Annabelle Hydrangea is a cold hardy shrub that is well known for its large, compact clusters of white flowers. Unlike other flowering species, Hydrangeas do best in partial shade. However, they are capable of growing in full sun if the soil is kept consistently moist.

Blooms occur on new wood, so regular pruning is encouraged in late winter. Try Annabelle Hydrangea as a border or on its own.

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.

Annabelle Hydrangea Quick Facts

Cow Parsnip Quick Facts

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Zone: 3a
Zone: 2a
Height: 1.2 m (4 ft)
Height: 1.8 m (6 ft)
Spread: 1.5 m (5 ft)
Spread: 1.2 m (4 ft)
Light: partial shade
Light: partial shade, full sun
Moisture: normal
Moisture: normal, wet
Growth rate: fast
Growth rate: fast
Life span: medium
Life span: short
Growth form: upright
Spreading: seeds - low
Suckering: medium


Toxicity: sap causes skin irritation
Foliage: very large, palmate leaves
Flowers: white, showy clusters
Flowers: large clusters of white 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