Buttonbush vs Cow Parsnip - TreeTime.ca

Buttonbush vs Cow Parsnip

Heracleum maximum

Cephalanthus occidentalis

CUSTOM GROW

CUSTOM GROW

Cow Parsnip
Buttonbush

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.

Buttonbush is a moisture loving shrub that provides year round interest.

It has round, fragrant flowers resembling small buttons or pincushions. The flowers transform into small reddish-brown fruit that persists into winter while the leaves take on shades of red in fall.

Providing essential food to bees, butterflies, and other insects, this shrub is versatile. Try it in your next shrub border.

Cow Parsnip Quick Facts

Buttonbush Quick Facts

Zone: 2a
Zone: 4a
Height: 1.8 m (6 ft)
Height: 2.4 m (8 ft)
Spread: 1.2 m (4 ft)
Spread: 1.5 m (5 ft)
Light: partial shade, full sun
Light: any
Moisture: normal, wet
Moisture: normal, wet
Growth rate: fast
Growth rate: medium
Life span: short
Life span: long
Growth form: upright
Spreading: seeds - low
Suckering: low
Maintenance: medium

Toxicity: sap causes skin irritation

Foliage: very large, palmate leaves
Flowers: large clusters of white flowers
Flowers: large, white, spherical
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
Native to: ON, QC, NS, NB
Other Names: american cow parsnip, common cow parsnip