Water Arum vs Sweet Gale - TreeTime.ca

Water Arum vs Sweet Gale

Calla palustris

Myrica gale

CUSTOM GROW

CUSTOM GROW

Water Arum
Sweet Gale

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.

Sweet Gale is a native, nitrogen-fixing shrub known for its aromatic foliage. Tiny glands on the leaves release a balmy, bay leaf-like scent with floral and citrus notes. In spring, the yellowish male catkins provide one of the earliest sources of pollen for bees and other insects. While later in the season, the female catkins produce seeds that are eaten by waterfowl. Sweet Gale is dioecious, meaning male and female flowers occur on separate plants.

Sweet Gale thrives in wet, acidic soils and is commonly found along wetlands and lakeshores. It can help stabilize shorelines, while its dense growth provides valuable cover for wildlife. It is well-suited for naturalization, wetland restoration, and erosion control projects.

Water Arum Quick Facts

Sweet Gale Quick Facts

Zone: 1b
Zone: 1b
Height: 0.2 m (0.8 ft)
Height: 1.2 m (4 ft)
Spread: 0.2 m (0.8 ft)
Spread: 0.9 m (3 ft)
Light: shade, partial shade
Light: partial shade, full sun
Moisture: wet
Moisture: normal, wet
Growth rate: medium
Growth rate: medium
Life span: short
Life span: medium
Growth form: colony-forming
Growth form: upright, thicket-forming
Spreading: rhizomes - medium, seeds - low
Spreading: suckering - medium, seeds - low

Toxicity: toxic if ingested

Foliage: dotted with yellow glands, sweet scented
Fall colour: yellow
Bark: reddish-purple, dotted with yellow glands
Flowers: white sheath around and yellow spike
Bloom time: spring to summer
Berries: red, in clusters
Hybrid: no
Hybrid: no
Catkins: no
Catkins: yes


Native to: AB, BC, SK, MB, ON, QC, NS, NB, NL, YT, NT, PE
Native to: AB, BC, SK, MB, ON, QC, NS, NB, NL, YT, NT, NU, PE
Other Names: bog arum, swamp lily, wild calla, wild dragon
Other Names: bog myrtle, meadow-fern, sweet bayberry, sweetgale