Anise Hyssop vs Early Blue Violet - TreeTime.ca

Anise Hyssop vs Early Blue Violet

Agastache foeniculum

Viola adunca

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Anise Hyssop
Early Blue Violet

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.

As a perennial, it dies back to the crown each winter, it will regrow from the base in the spring. Avoid disturbing the crown during late winter to ensure healthy growth the following season.

Early Blue Violet is a low-growing native perennial wildflower valued for its striking early-spring blooms. The flowers range in color from vibrant blue to deep violet, often marked with pale highlights and fine white hairs. They provide an important early nectar source for pollinators and serve as a host plant for several fritillary butterfly species.

It spreads by both seed and rhizomes, gradually forming small colonies. Its dark green, heart-shaped leaves add ornamental appeal, and the plant shows some resistance to deer browsing. Early Blue Violet is well-suited to naturalization projects and pollinator-friendly gardens, and has also been used in coastal butterfly habitat restoration in the Pacific Northwest.

Anise Hyssop Quick Facts

Early Blue Violet Quick Facts

Zone: 3b
Zone: 2a
Height: 0.9 m (3 ft)
Height: 0.1 m (0.3 ft)
Spread: 0.6 m (2.0 ft)
Spread: 0.2 m (0.5 ft)
Light: partial shade, full sun
Light: partial shade, full sun
Moisture: dry, normal
Moisture: dry, normal
Growth rate: fast
Growth rate: fast
Life span: short
Life span: short
Growth form: upright, clump-forming
Growth form: low growing, clump-forming
Spreading: seeds - high, rhizomes - medium
Spreading: seeds - medium, rhizomes - medium
Maintenance: medium
Maintenance: medium


Toxicity: rhizomes, fruit, seed poisonous to humans
Foliage: aromatic when crushed
Flowers: spikes of purple flowers
Flowers: purple to blue-violet
Bloom time: summer to fall
Bloom time: mid spring to early summer
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no


Native to: AB, SK, MB, ON, NT
Native to: AB, BC, SK, MB, ON, QC, NS, NB, YT, NT
Other Names: blue giant hyssop, giant hyssop, lavender hyssop
Other Names: dog violet, hookedspur violet, sand violet, western blue violet