Water Sedge vs American Sweet Flag - TreeTime.ca

Water Sedge vs American Sweet Flag

Acorus americanus

Carex aquatilis

CUSTOM GROW

CUSTOM GROW

American Sweet Flag
Water Sedge

American Sweet Flag is a native perennial wetland plant found along shorelines, streams, wet meadows, and marshes. Its extensive rhizome system allows it to spread and stabilise soil, helping maintain the edges of ponds and streams. This dense growth provides cover for small animals and supports overall wetland biodiversity, while the rhizomes and seeds serve as food for small mammals and waterfowl. Cold-hardy and resilient, it is well-suited for ecological restoration, riparian plantings, erosion control, and naturalization projects.

The plant grows in dense clumps with tall, sword-shaped leaves that release a citrus-like scent when bruised. The rhizomes are aromatic, with a spicy, cinnamon-like fragrance that has been used in perfumery and flavouring. In early summer, American Sweet Flag produces a distinctive floral spike (spadix), adding visual interest to wetland plantings.

Water Sedge is a waterside grass which grows an extensive horizontal root system. This prevents erosion and allows it to grow back after being eaten.

Water sedge is grazed by many animals including cattle, sheep, horses and waterfowl. Animals choose Water Sedge for forage later in the year as it stays green longer than other plants, requiring you to buy feed for less of the year.

American Sweet Flag Quick Facts

Water Sedge Quick Facts

Zone: 3a
Zone: 1a
Height: 0.9 m (3 ft)
Height: 0.9 m (3 ft)
Spread: 0.6 m (2.0 ft)
Spread: 0.5 m (1.5 ft)
Light: partial shade, full sun
Light: full sun
Moisture: wet
Moisture: wet
Growth rate: fast
Growth rate: fast
Life span: short
Life span: short
Growth form: upright, colony-forming
Spreading: rhizomes - high
Suckering: medium


Foliage: fragrant
Foliage: long thin leaves
Flowers: yellow floral spike
Flowers: green and brown
Bloom time: spring to summer
Seeds: achenes
Hybrid: no
Hybrid: no
Catkins: no
Catkins: no


Native to: AB, BC, SK, MB, ON, QC, NS, NB, NL, NT, PE
Native to: AB, BC, SK, MB, ON, QC, NS, NB, NL, YT, NT, NU, PE
Other Names: american sweetflag
Other Names: leafy tussock sedge