Photo: Digigalos — Public domain · source
Survives zone 5 through 8
Harvest calendar
Best planted in early spring after your last frost, or in fall before the ground freezes, depending on your climate.
A small, often dwarf chestnut relative from China, notable for bearing heavily at a young age and historically used as a blight-resistance breeding source — though its resistance proved less reliable than Chinese chestnut's, especially in colder climates — and it is deliberately planted today as a trap crop to lure gall wasps away from commercial chestnut orchards.
- Hardiness
- Zone 5–8
- Habit
- Tree
- Edible part
- Nut
- Ripens
- Sept–Oct
- Mature size
- Shrub or small tree 3–12 m
- 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 forests and thickets at roughly 400-2,000 m elevation, across some fifteen provinces from Anhui to Yunnan.
- Status
- Both wild and cultivated
- Years to fruit
- 3–5 yrs grafted
- Growth speed
- Medium growth rate for a naturally variable, often dwarf tree (4-12 m), noted for bearing heavily at an earlier age than most other chestnuts.
- Spacing
- 500 cm (197 in) apart — about 25 m² (269 sq ft) per plant
- Leaf shape
- Oblong-obovate to elliptic-oblong, 6-14 cm long, with a coarsely serrate margin and yellowish-brown to gray scaly glands on the underside.
- 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
- A cupule 3-5 cm wide, its spiny bracts sparsely hairy and shorter and softer than in most other chestnuts, holds two or three small nuts 1.5-2 cm across — good-flavored but astringent raw unless the inner skin is removed, turning sweet and floury when baked.
- Propagation
- Grown from seed sown as soon as ripe, protected from drying out and from rodents (short viability; refrigerate damp if storing), germinating in late winter or early spring; seedlings are kept 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. Tolerates poor, dry, infertile, very acid sandy soils and prefers a well-drained, slightly acid loam; dislikes calcareous soils though it can succeed on harder limestone. Sometimes used as an enrichment planting in the understorey of pine forests.
How it spreads. Naturally variable in habit from shrub to small tree; traditionally coppiced for firewood in its native China, which points to vigorous regrowth from cut stems rather than to suckering or self-seeding spread.
Growing tips. Historically used in early 20th-century breeding programs as a source of blight resistance, valued for its dwarf stature and precocious, heavy bearing at a young age — but it proved less useful in colder US climates because winter injury and frost cracking undermined its blight tolerance there. Comparative studies of wild populations have since found its blight tolerance measurably lower than that of Chinese chestnut. It is also grown deliberately as a 'trap crop' to draw Asian chestnut gall wasps away from commercial Chinese chestnut orchards.
Grow journal
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