Blue Boy Clematis vs Sulphur-Flower Buckwheat - TreeTime.ca

Blue Boy Clematis vs Sulphur-Flower Buckwheat

Clematis integrifolia Blue Boy

Eriogonum umbellatum

NOT AVAILABLE THIS SEASON - MIGHT RETURN

CUSTOM GROW

Blue Boy Clematis
Sulphur-Flower Buckwheat

Blue Boy Clematis is a cold-hardy, fast growing, woody climbing vine. Hundreds of stunning steel-blue bell shaped flowers adorn the vine throughout the summer that droop and appear to hang in the air. The fibrous stems spread and create a fan-like symmetry shape.

This species will do best with support from a trellis, fence, or even other shrubs or tree stumps.

The Blue Boy Clematis was developed in Manitoba, Canada in 1947 by famous breeder Frank L. Skinner by crossing C. integrifolia x C. viticella, but it didn’t gain popularity until the 1990’s.

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.

Blue Boy Clematis Quick Facts

Sulphur-Flower Buckwheat Quick Facts

Zone: 2b
Zone: 3a
Height: 3 m (10 ft)
Height: 0.2 m (0.5 ft)
Spread: 0.6 m (2.0 ft)
Spread: 0.5 m (1.5 ft)
Light: partial shade, full sun
Light: partial shade, full sun
Moisture: normal, wet
Moisture: dry, normal
Growth rate: medium
Growth rate: medium
Life span: medium
Life span: short
Growth form: upright to spreading, clump-forming
Spreading: seeds - low
Suckering: medium


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


Native to: AB, BC
Other Names: sulphur buckwheat, sulphur flower, wild buckwheat