Green Alder vs Pygmy Caragana - TreeTime.ca

Green Alder vs Pygmy Caragana

Caragana pygmaea

Alnus alnobetula subsp. crispa

CUSTOM GROW

Pygmy Caragana
Green Alder

Pygmy Caragana is a shrub that is related to Common Caragana and has a compact size that is suitable for yards with limited space. Its size is perfect for landscaping and decorative hedges, and requires little maintenance. This nitrogen fixer has fine-textured foliage and small yellow flowers. Much like Common Caragana, it is hardy and drought tolerant.

Popular as a low maintenance commercial landscaping shrub and for hedging. This species does have tiny spines that might poke you a bit. It has a nice appealing texture when mature.

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.

Pygmy Caragana Quick Facts

Green Alder Quick Facts

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Zone: 2b
Zone: 1a
Height: 1.2 m (4 ft)
Height: 7 m (23 ft)
Spread: 1.2 m (4 ft)
Spread: 3 m (10 ft)
Light: full sun
Light: any
Moisture: dry, normal
Moisture: any
Growth rate: medium
Growth rate: fast
Life span: medium
Life span: short
Suckering: none
Suckering: high


Flowers: prolific tiny yellow pea-like flowers
Seeds: prolific seedpods are edible
Hybrid: no
Hybrid: no
Catkins: no
Catkins: yes


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
Other Names: pygmy peashrub
Other Names: american green alder