Photo: KATHERINE WAGNER-REISS — CC BY-SA 4.0 · source
Survives zone 6 through 9
Harvest calendar
Best planted in early spring after your last frost, or in fall before the ground freezes, depending on your climate.
A tall timber chestnut from central China that can reach 30 m at home but stays a stunted shrub for decades in cool climates — one Kew Gardens specimen remained only about 3 m tall after many years in the ground — and each spiny husk holds just a single small, cone-shaped nut rather than the two or three typical of most other chestnuts.
- Hardiness
- Zone 6–9
- Habit
- Tree
- Edible part
- Nut
- Ripens
- Sept–Oct
- Mature size
- Large tree 20–30 m — not containerable
- Light
- Full sun to partial
- Soil pH
- Castanea 4.5–6.5 — ⚠ LIME-INTOLERANT (calcifuge, unlike other nut trees). Quercus/Fagus 5.0–6.5
- Environment
- Montane
- Native range
- South-central and southeastern China, in mixed mesophytic mountain forests at roughly 100-1,800 m elevation, including Anhui, Fujian, Guangdong, Sichuan and Yunnan provinces.
- Status
- Both wild and cultivated
- Years to fruit
- 3–5 yrs grafted
- Growth speed
- Slow-growing outside hot-summer climates — a specimen at Kew Gardens remained only about 3 m tall after decades in the ground, while trees in its native central-China range grow much faster and reach full size (to 30 m).
- Spacing
- 800 cm (315 in) apart — about 64 m² (689 sq ft) per plant
- Leaf shape
- Oblong-lanceolate, 10-20 cm long by 2.5-6 cm wide, wedge-shaped at the base and tapering to a long slender point, with bristle-tipped teeth ending each of the 12-20 pairs of side veins — narrower and more numerous-veined than most other chestnut leaves.
- Root system
- A strong taproot when young giving way to deep, wide-spreading laterals — chestnuts anchor well and stand drought once established, but they transplant badly for the same reason. Move them small, and never into wet ground: the tree is acutely susceptible to Phytophthora ink disease on soils that lie cold and saturated.
- Fruit description
- Each prickly husk — the spines sparsely hairy rather than sharply glassy — encloses a single cone-shaped nut about 12-18 mm wide at the base, distinctly small for such a large tree; raw nuts are notably astringent unless the inner skin is removed, but become sweet and floury when baked.
- Propagation
- Propagated from seed sown as soon as ripe in a cold frame or outdoor bed, kept moist and cool (refrigeration works for a few months) until germination in late winter or early spring; seedlings remain in nursery beds for 1-2 years before transplanting.
- Pollination
- ⚠ SELF-INCOMPATIBLE — needs TWO trees; a lone tree bears little or nothing
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. Like other chestnuts, prefers a well-drained, slightly acid loam and tolerates poor, dry, very acid sandy soils; dislikes calcareous ground though it can succeed on harder limestone.
How it spreads. Single-trunked forest tree — no documented suckering or self-seeding spread.
Growing tips. Carries a documented, if partial, level of chestnut blight resistance — described in cultivation notes as resisting Endothia (Cryphonectria) blight, and it has been used in molecular breeding work to introgress blight resistance into other chestnuts. However, comparative studies of wild populations found its blight tolerance lower than that of Chinese chestnut. It is also resistant to honey fungus but needs a hot summer to grow well and is notably slow and often stunted in cool climates.
Grow journal
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