Photo: Original: Olga Ukhvatkina; edit: MPF — CC BY-SA 4.0 · 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.
Korean pine is the pine nut of everyday commerce — the main species behind the pine nuts sold internationally out of China, Russia and North Korea (together over 60% of the global supply), wild-collected from natural stands and largely processed for export in northeastern China.
- Hardiness
- Zone 3–7
- Habit
- Tree
- Edible part
- Nut
- Ripens
- Autumn (cones)
- Mature size
- Tree 20–30 m, occasionally to 50 m — not containerable for cropping
- Light
- Full sun — cone/seed set needs sun
- Soil pH
- 5.0–7.0
- Environment
- Temperate to boreal
- Native range
- Mountains of the Russian Far East, northeastern China, the Korean Peninsula and central Japan, generally at 600–900 m in the north and higher elevations farther south.
- Status
- Both wild and cultivated
- Years to fruit
- 50–80 yrs for wild trees; ~20 yrs cultivated; grafted selections can cone within just a few years.
- Growth speed
- Moderate — young trees reach roughly 3.5–6 m (12–20 ft) in their first decade.
- Spacing
- 800 cm (315 in) apart — about 64 m² (689 sq ft) per plant
- Leaf shape
- Needles in fascicles of five, 7–15 cm long.
- Root system
- A deep taproot from the first year, later joined by wide laterals near the surface — the combination that lets these pines hold rocky, droughty ground where little else will. The taproot is also why container-grown plants must go out young: a spiralled root never recovers.
- Fruit description
- Cones are large, 9–14 cm long (rarely to 20 cm) and 6–8 cm across, and stay closed on the tree — nutcrackers and rodents do the work of extracting the large, reddish-brown, thick-shelled, wingless seeds.
- Propagation
- By seed, which has deep morphophysiological dormancy — commercial nurseries typically use about 6 months (up to 9–12 months) of cold stratification, sometimes preceded by 60 days of warm stratification, for good germination; grafted seedlings bring named or high-yielding selections into cone production much sooner than seedlings do.
- Pollination
- Monoecious, wind-pollinated — plant more than one
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.
Growing guide
Fertilizing. Prefers well-drained, mildly acid to neutral soil (pH 5.5–7.0) and tolerates nutritionally poor ground; established trees rarely need feeding beyond an occasional light spring dose for young plantings.
Growing tips. A large, long-lived tree (30–50 m tall, occasionally to 700+ years old) that is notoriously slow to bear in the wild — 50 to 80 years for first cones — though cultivated trees can start after about 20 years and grafted trees within just a few. Watch for tip blight, needle scale and sawflies; as an Asian white pine it carries only partial resistance to white pine blister rust (around 20% infection in Korean field trials versus 40%+ for the fully susceptible North American eastern white pine).
Companion planting. As a five-needle (white) pine it can host white pine blister rust; avoid planting near Ribes (currant/gooseberry) species, the fungus's obligatory alternate host, especially where the rust is already established.
Grow journal
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