Sea Buckthorn (Seaberry) vs Sitka Alder - TreeTime.ca

Sea Buckthorn (Seaberry) vs Sitka Alder

Hippophae rhamnoides l.

Alnus alnobetula subsp. sinuata

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(new stock expected: fall of 2025)

CUSTOM GROW

Sea Buckthorn (Seaberry)
Sitka Alder

Sea Buckthorn, aka Seaberry, is a nitrogen fixing shrub that produces attractive berries high in vitamin C.

While we can't confirm claims that the berries are effective in treating various ailments, many people believe consuming the berries helps with arthritis, infections, and asthma, among other things.

Sea Buckthorn plants have attractive pale silvery-green leaves, dense branches, and large thorns, people like to grow in ornamental hedges or as a first row in a shelterbelt.

Note: these plants typically reach maturity and make their sex easily known (females producing fruit) in their 3rd or 4th year of growth. Our seedlings are too young to identify their sex.

Sitka Alder is a native deciduous shrub or small tree that often forms dense thickets. Its extensive root system stabilizes slopes and streambanks. Nitrogen-fixing capabilities and nutrient-rich leaf litter improve soil fertility, creating better growing conditions for surrounding plants. These qualities make it especially effective in disturbed or erosion-prone sites.
Often found in moist, high-elevation mountain environments, Sitka Alder also enhances habitat by providing cover and structure in both riparian and upland areas. Birds and small mammals utilize it for nesting, and its seeds serve as a food source.
Note: We use Sitka Alder for Alnus alnobetula subsp. sinuata. This species is also known by many other common names, including Mountain Alder, Green Alder, and others. Please confirm the scientific name to ensure you are ordering the correct plant.

Sea Buckthorn (Seaberry) Quick Facts

Sitka Alder Quick Facts

Zone: 2b
Zone: 2a
Height: 5 m (15 ft)
Height: 5 m (15 ft)
Spread: 4 m (12 ft)
Spread: 3 m (10 ft)
Light: full sun
Light: partial shade, full sun
Moisture: dry, normal
Moisture: wet
Growth rate: medium
Growth rate: medium
Life span: medium
Life span: medium
Growth form: upright to prostrate, thicket-forming
Spreading: seed - medium, layering - medium
Suckering: high


Foliage: slender silvery-green leaves
Bark: redish-brown to grey, smooth
Berries: small, edible
Hybrid: no
Hybrid: no
Catkins: no
Catkins: yes

In row spacing: 0.9 - 1.2 m (3 - 4 ft)

Between row spacing: 5 m (16 ft)
Native to: AB, BC, YT, NT
Other Names: sallowthorn, sandthorn, seaberry
Other Names: wavy leaf alder