Green Alder vs Seaside Arrowgrass - TreeTime.ca

Green Alder vs Seaside Arrowgrass

Alnus alnobetula subsp. crispa

Triglochin maritima

COMING SOON

(new stock expected: fall of 2025)

NOT AVAILABLE THIS SEASON - MIGHT RETURN

Green Alder
Seaside Arrowgrass

Green Alder is a cold hardy, native shrub. It is often planted on infertile sites so it can fix nitrogen from the air and improve the soil quality.

Green Alder is known for its smooth grey bark and attractive shiny green leaves; it is commonly used in reclamation.

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.

Green Alder Quick Facts

Seaside Arrowgrass Quick Facts

Zone: 1a
Zone: 1b
Height: 7 m (23 ft)
Height: 0.5 m (1.5 ft)
Spread: 3 m (10 ft)
Spread: 0.3 m (1.0 ft)
Light: any
Light: full sun
Moisture: any
Moisture: wet
Growth rate: fast
Growth rate: medium
Life span: short
Life span: short
Growth form: upright, clump-forming
Spreading: rhizomes-low, seeds-low
Suckering: high


Toxicity: can be toxic to humans and livestock
Flowers: very small, pinkish-white, hair like
Bloom time: spring to early summer
Hybrid: no
Hybrid: no
Catkins: yes
Catkins: no

In row spacing: 0.9 m (3 ft)

Between row spacing: 5 m (16 ft)
Native to: AB, SK, MB, ON, NS, NB, NL, YT
Native to: AB, BC, SK, MB, ON, QC, NS, NB, NL, YT, NT, NU, PE
Other Names: american green alder
Other Names: common arrowgrass, common bog arrowgrass, shore arrowgrass