Water Arum vs Anise Hyssop - TreeTime.ca

Water Arum vs Anise Hyssop

Calla palustris

Agastache foeniculum

CUSTOM GROW

NOT AVAILABLE THIS SEASON - MIGHT RETURN

Water Arum
Anise Hyssop

Water Arum is a native perennial wetland plant known for its showy white oval sheaths (spathe) that surround a yellow-green, cylindrical flower spike (spadix). It has large, oblong, heart-shaped leaves on stems that rise above the water from shallow, spreading rhizomes. The blossoms are followed in late summer by tiny, pear-shaped fruits that ripen to bright red, adding ornamental interest to wet habitats.

Water Arum provides food for birds and small mammals that eat its berries, and its flowers attract pollinators. It can tolerate cold climates and forms colonies in shallow water and saturated soils. It is well-suited for ecological restoration, riparian planting, naturalisation, and habitat projects in wet and shaded environments.

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.

Water Arum Quick Facts

Anise Hyssop Quick Facts

Zone: 1b
Zone: 3b
Height: 0.2 m (0.8 ft)
Height: 0.9 m (3 ft)
Spread: 0.2 m (0.8 ft)
Spread: 0.6 m (2.0 ft)
Light: shade, partial shade
Light: partial shade, full sun
Moisture: wet
Moisture: dry, normal
Growth rate: medium
Growth rate: fast
Life span: short
Life span: short
Growth form: colony-forming
Growth form: upright, clump-forming
Spreading: rhizomes - medium, seeds - low
Spreading: seeds - high, rhizomes - medium
Maintenance: medium

Toxicity: toxic if ingested

Foliage: aromatic when crushed
Flowers: white sheath around and yellow spike
Flowers: spikes of purple flowers
Bloom time: spring to summer
Bloom time: summer to fall
Berries: red, in clusters
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no


Native to: AB, BC, SK, MB, ON, QC, NS, NB, NL, YT, NT, PE
Native to: AB, SK, MB, ON, NT
Other Names: bog arum, swamp lily, wild calla, wild dragon
Other Names: blue giant hyssop, giant hyssop, lavender hyssop