Seaside Arrowgrass vs Water Arum - TreeTime.ca

Seaside Arrowgrass vs Water Arum

Triglochin maritima

Calla palustris

CUSTOM GROW

CUSTOM GROW

Seaside Arrowgrass
Water Arum

Seaside Arrowgrass is a native perennial commonly found in wetlands, salt marshes, and moist meadows. It is especially suitable for difficult growing sites. Its dense root system helps stabilize soil, while also providing food, cover, and habitat for small animals within the wetland community.

Seaside Arrowgrass is suitable for shoreline stabilization, wetland restoration, and naturalization projects.

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.

Seaside Arrowgrass Quick Facts

Water Arum Quick Facts

Zone: 1b
Zone: 1b
Height: 0.5 m (1.5 ft)
Height: 0.2 m (0.8 ft)
Spread: 0.3 m (1.0 ft)
Spread: 0.2 m (0.8 ft)
Light: full sun
Light: shade, partial shade
Moisture: wet
Moisture: wet
Growth rate: medium
Growth rate: medium
Life span: short
Life span: short
Growth form: upright, clump-forming
Growth form: colony-forming
Spreading: rhizomes-low, seeds-low
Spreading: rhizomes - medium, seeds - low

Toxicity: can be toxic to humans and livestock

Toxicity: toxic if ingested
Flowers: very small, pinkish-white, hair like
Flowers: white sheath around and yellow spike
Bloom time: spring to early summer
Bloom time: spring to summer
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, NU, PE
Native to: AB, BC, SK, MB, ON, QC, NS, NB, NL, YT, NT, PE
Other Names: common arrowgrass, common bog arrowgrass, shore arrowgrass
Other Names: bog arum, swamp lily, wild calla, wild dragon