Green Alder vs Tall Manna Grass - TreeTime.ca

Green Alder vs Tall Manna Grass

Alnus alnobetula subsp. crispa

Glyceria grandis

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CUSTOM GROW

Green Alder
Tall Manna Grass

Green Alder is a native, cold-hardy shrub found in boreal forests, along slopes, and in open upland habitats. It fixes nitrogen in the soil, improving fertility and helping other plants grow, while its roots help stabilize slopes and disturbed ground. Fast to establish on poor soils, it is widely used in reclamation, restoration, and erosion control projects.

With its smooth grey bark and shiny green leaves, Green Alder often forms dense thickets that provide cover for birds and small mammals. Its seeds, buds, and catkins also supply food for wildlife. Green Alder is well suited for naturalization and ecological restoration.

Note: We use Green Alder for Alnus alnobetula subsp. crispa. This species is also known by many other common names, including Mountain Alder, Sitka Alder, and others. Please confirm the scientific name to ensure you are ordering the correct plant.

Manna Grass and other waterside plants are an excellent way to prevent erosion and provide habitat and forage for animals. The difference is that Manna Grass looks better doing it! With distinctive purple grains at the top of its stalks, Manna Grass adds a splash of color to the waterside that most other aquatics can't offer.

Manna Grass is good for returning disturbed sites to nature and provides nourishment to many animals, except for cattle who find it toxic.

Green Alder Quick Facts

Tall Manna Grass Quick Facts

Zone: 1a
Zone: 1a
Height: 7 m (23 ft)
Height: 1.2 m (4 ft)
Spread: 3 m (10 ft)
Spread: 0.6 m (2.0 ft)
Light: any
Light: full sun
Moisture: any
Moisture: wet
Growth rate: fast
Growth rate: fast
Life span: short
Life span: short
Suckering: high
Suckering: medium


Toxicity: toxic to cattle
Foliage: long thin leaves
Flowers: purple
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, PE
Other Names: american green alder
Other Names: american manna grass, reed manna grass