sea buckthorn / seaberry

Photo: No machine-readable author provided. Svdmolen assumed (based on copyright claims). — CC BY-SA 3.0 · source

Survives zone 3 through 7

Harvest calendar

Best planted in early spring after your last frost, or in fall before the ground freezes, depending on your climate.

⚠ Intensely acidic — not fresh eating; for juice, oil and syrup. Very high vitamin C.

Spread warning. Introduced to Canada in 1938 for ornamental and shelterbelt planting; has since spread by root suckering and bird-dispersed seed into prairie and floodplain habitats and is now flagged as invasive there. Roots sucker vigorously and are difficult to contain — plant where root spread is acceptable, or behind a barrier.

Hardiness

Zone 3–7

Habit

Shrub

Edible part

Fruit

Ripens

Late summer, holds into winter

Mature size

Suckering shrub 2–4 m; container-awkward

Light

Full sun (obligate — very shade-intolerant)

Soil pH

5.5–8.5 (very wide; nitrogen-fixing)

Environment

Coastal and montane

Native range

Native across a broad Eurosiberian range — from the Atlantic and North Sea coasts of Norway, Britain and France south to Spain, and east through Russia, Central Asia, Mongolia and China to the Himalayas of India and Pakistan (roughly 27°–69°N).

Status

Both wild and cultivated

Years to fruit

2–4 yrs

Growth speed

Medium — reaches about 6 m by 2.5 m at a medium rate under cultivation (occasionally to 8–12 ft wide, rarely to 15–20 m in tree form in its native habitat), typically reaching fruiting maturity in 3–5 years.

Spacing

150 cm (59 in) apart — about 2.3 m² (24 sq ft) per plant

Leaf shape

Narrow, alternate, lanceolate leaves 1–8 cm long and up to about 1 cm wide. New growth is covered in silvery scales; the upper leaf surface darkens to grey-green through the season while the underside stays persistently silvery.

Root system

An extensive, fibrous and strongly suckering root system, with taproots recorded to about 4 m deep and lateral roots spreading up to 10 m — the fibrous mat helps bind loose sand and soil. Roots carry nitrogen-fixing nodules formed in symbiosis with the actinobacterium Frankia.

Fruit description

Round to oval berries about 6–8 mm across, weighing roughly 270–480 mg each, borne in dense clusters pressed tightly along the branches; color ranges from pale yellow through bright orange to dark orange. Raw fruit is very sour and astringent — most people find it unpalatable fresh — but it mellows after a frost or cooking. The pulp and seed together yield up to about 9.2% oil (seeds alone about 12–13%), and the fruit is exceptionally high in vitamin C, up to roughly 400 mg per 100 g.

Propagation

Propagated from seed (cold-stratify about 3 months, or sow ripe seed in fall), from half-ripe cuttings taken June–July, from hardwood cuttings taken in late autumn and rooted with bottom heat, or by lifting and replanting root suckers in winter — suckers establish especially fast. Because the species is dioecious and seedlings are unsexed until flowering, named fruiting cultivars are propagated vegetatively (cuttings or suckers) to guarantee sex and fruit quality.

Pollination

Wind-pollinated, with male flowers offering little nectar or pollen reward for insects. Commercial orchards commonly plant one male for every 6–8 females (some low-density plantings use ratios as wide as 1:60+), and a male shrub can shed viable pollen effectively over roughly 10–40 m, with some reports of pollination occurring up to 300 m downwind.

The edible parts listed above are a starting point, not a field guide. Identify a plant with certainty — ideally against a local authority — before eating any part of it, and read the full disclaimer. Spotted something wrong? Report it.