Buttonbush vs Sulphur-Flower Buckwheat - TreeTime.ca

Buttonbush vs Sulphur-Flower Buckwheat

Cephalanthus occidentalis

Eriogonum umbellatum

CUSTOM GROW

CUSTOM GROW

Buttonbush
Sulphur-Flower Buckwheat

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.

Sulphur-Flower Buckwheat is a native perennial wildflower known for its dense clusters of cream to yellow flowers. The long-lasting blooms persist from late spring into summer, providing an extended nectar source for a variety of pollinators. The flower buds are often red-tinted before opening. As the blooms age, they shift to orange or red, adding seasonal interest and making them well-suited to dried flower arrangements. Its seeds are also eaten by birds, adding to its ecological value.

Depending on climate and conditions, Sulphur-Flower Buckwheat may be evergreen to semi-evergreen, or its foliage may turn red during fall. Its deep roots and spreading growth stabilize rocky or sandy soils, making it useful for erosion control. Exceptionally hardy once established, it requires little care and thrives in challenging environments, making it an excellent choice for pollinator gardens, naturalization, and ecological restoration projects.

Buttonbush Quick Facts

Sulphur-Flower Buckwheat Quick Facts

Zone: 4a
Zone: 3a
Height: 2.4 m (8 ft)
Height: 0.2 m (0.5 ft)
Spread: 1.5 m (5 ft)
Spread: 0.5 m (1.5 ft)
Light: any
Light: partial shade, full sun
Moisture: normal, wet
Moisture: dry, normal
Growth rate: medium
Growth rate: medium
Life span: long
Life span: short
Growth form: upright to spreading, clump-forming
Spreading: seeds - low
Suckering: low
Maintenance: medium


Foliage: leathery
Fall colour: reddish bronze
Flowers: large, white, spherical
Flowers: colour varies, typically white to yellow
Bloom time: mid spring to mid summer
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no


Native to: ON, QC, NS, NB
Native to: AB, BC
Other Names: sulphur buckwheat, sulphur flower, wild buckwheat