Photo: Michael Ellis — CC BY 4.0 · source
Survives zone 5 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 thicket-forming shrub or small tree of the eastern and southern US whose single-seeded, spiny burrs hold sweet, nutty kernels that many rate as better-flavored than true sweet chestnut — more blight-resistant than American chestnut but not immune, it survives largely by resprouting suckers rather than by any individual stem outliving the disease.
- Hardiness
- Zone 5–9
- Habit
- Tree
- Edible part
- Nut
- Ripens
- Sept–Oct
- Mature size
- Shrub or small tree 2–8 m, suckering into thickets
- Light
- Partial to full sun — fruits best in openings
- Soil pH
- Castanea 4.5–6.5 — ⚠ LIME-INTOLERANT (calcifuge, unlike other nut trees). Quercus/Fagus 5.0–6.5
- Environment
- Temperate
- Native range
- Eastern and southeastern United States, from New Jersey and Pennsylvania south to central Florida and west to eastern Texas and southern Missouri, typically on dry sandy ridges, rich hillsides and woodland margins.
- Status
- Both wild and cultivated
- Years to fruit
- 3–5 yrs grafted
- Growth speed
- Slow growth rate; seedlings can begin fruiting in as little as 2-3 years.
- Spacing
- 550 cm (217 in) apart — about 30 m² (326 sq ft) per plant
- Leaf shape
- Narrowly elliptical to lanceolate, 7.5-15 cm long by 3-5 cm wide, yellow-green above and paler and finely hairy beneath, with parallel side veins ending in short, pointed teeth.
- Root system
- Shallow, plate-like roots radiating from the crown (sometimes described as a 'heart root'), with underground runners that produce the suckers responsible for its thicket-forming habit.
- Fruit description
- A golden, densely spiny cupule 2-3 cm across holds a single dark brown, ovoid nut roughly half the size of a sweet chestnut and not flattened — sweet and nutty raw, considered by many to outshine sweet chestnut in flavor, and floury and sweeter still when baked.
- Propagation
- Propagated from seed sown as soon as ripe and kept moist (short viability), germinating in late winter or early spring; seedlings can be left in beds 1-2 years before transplanting. Also increased by dividing rooted suckers in winter, which can be planted directly into a permanent position.
- 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 nutritionally poor, very acid, dry sandy soils and grows in light, medium or heavy soils provided they are well drained; dislikes calcareous ground.
How it spreads. Spreads readily by underground suckers or root runners, often forming dense thickets rather than remaining a single specimen — unlike most other Castanea species.
Growing tips. More resistant to chestnut blight than American chestnut, but not immune — heavily diseased, cankered trees are still commonly reported. Because it keeps sending up new suckers even after top growth is killed, it persists and continues to fruit in many stands despite blight pressure. Needs full sun and a hot summer to thrive; cannot grow in shade.
Grow journal
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