Blue Boy Clematis vs Anise Hyssop - TreeTime.ca

Blue Boy Clematis vs Anise Hyssop

Agastache foeniculum

Clematis integrifolia Blue Boy

NOT AVAILABLE THIS SEASON - MIGHT RETURN

NOT AVAILABLE THIS SEASON - MIGHT RETURN

Anise Hyssop
Blue Boy Clematis

Anise Hyssop is a native perennial wildflower known for its fragrant spikes of small purple flowers. This plant is an excellent source of nectar and is highly attractive to a variety of bees and other pollinators. Deadheading spent flowers will encourage more blooms throughout the season.

Its aromatic leaves release an anise-like (licorice) scent when crushed. Both the leaves and seeds are edible and have been used in teas and as flavouring. Leaves can be harvested at any time, though the oil content is highest just past full bloom. Deer tend to avoid Anise Hyssop because of its strong-smelling leaves. This makes it a useful plant for positioning as a protective border around more vulnerable species.

Anise Hyssop spreads by seeds and rhizomes, but is less aggressive than other members of the mint family and is easy to remove if needed. Historically, it was planted in large numbers as a honey plant to support apiaries. Birds also feed on its seeds, adding to its ecological value.

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.

Anise Hyssop Quick Facts

Blue Boy Clematis Quick Facts

Zone: 3b
Zone: 2b
Height: 0.9 m (3 ft)
Height: 3 m (10 ft)
Spread: 0.6 m (2.0 ft)
Spread: 0.6 m (2.0 ft)
Light: partial shade, full sun
Light: partial shade, full sun
Moisture: dry, normal
Moisture: normal, wet
Growth rate: fast
Growth rate: medium
Life span: short
Life span: medium
Growth form: upright, clump-forming
Spreading: seeds - high, rhizomes - medium
Suckering: medium
Maintenance: medium


Foliage: aromatic when crushed
Flowers: spikes of purple flowers
Flowers: steel blue
Bloom time: summer to fall
Hybrid: no
Hybrid: yes
Catkins: no
Catkins: no


Native to: AB, SK, MB, ON, NT
Other Names: blue giant hyssop, giant hyssop, lavender hyssop