Limelight Hydrangea vs Cow Parsnip - TreeTime.ca

Limelight Hydrangea vs Cow Parsnip

Heracleum maximum

Hydrangea paniculata Limelight

CUSTOM GROW

NOT AVAILABLE THIS SEASON - MIGHT RETURN

Cow Parsnip
Limelight Hydrangea

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.

Limelight Hydrangea is a flowering shrub that is known for its green flowers. As they mature, the flower colour changes from a pale green to a creamy white, followed by shades of pink and red. Hydrangea flowers persist longer compared to other flowering shrubs, blooming from late July into fall. They are a popular choice for flower arrangements.

The Limelight Hydrangea can be grown as a stand alone shrub, as a hedge, or incorporated into a flower garden. Blooms occur on new wood, so regular pruning is encouraged in late winter. This is an award winner from the Proven Winners® collection.

Cow Parsnip Quick Facts

Limelight Hydrangea Quick Facts

Zone: 2a
Zone: 3a
Height: 1.8 m (6 ft)
Height: 2.1 m (7 ft)
Spread: 1.2 m (4 ft)
Spread: 2.1 m (7 ft)
Light: partial shade, full sun
Light: partial shade, full sun
Moisture: normal, wet
Moisture: any
Growth rate: fast
Growth rate: medium
Life span: short
Life span: medium
Growth form: upright
Spreading: seeds - low
Suckering: none

Toxicity: sap causes skin irritation

Toxicity: toxic to dogs, cats, and horses
Foliage: very large, palmate leaves
Flowers: large clusters of white flowers
Flowers: greenish white
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
Other Names: limelight panicle hydrangea