Sweet chestnut Castanea sativa
Sweet chestnut (Castanea sativa) is a deciduous perennial tree in the Fagaceae family, native to Southern Europe, Turkey and the Caucasus. It grows 12–20 m (39–66 ft) tall and 10–15 m (33–49 ft) wide, wants full sun and moderate water, and is hardy to about -25 °C (-13 °F). Space plants about 12 m (39 ft) apart.
Plan Sweet chestnut in your garden →
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Sweet chestnut at a glance
| Type | Perennial tree, deciduous |
|---|---|
| Family | Fagaceae |
| Mature height | 12–20 m (39–66 ft) |
| Mature spread | 10–15 m (33–49 ft) |
| Spacing | 12 m (39 ft) centre to centre |
| Sun | Full sun, at least 7 h of direct sun a day |
| Water | Moderate; drought tolerance moderate, waterlogging tolerance none |
| Soil pH | 5–6.5 |
| Cold hardiness | About -25 °C (-13 °F) once established (roughly USDA zone 5) |
| Heat stress | Likely above about 35 °C (95 °F) |
| Flowering | from about June for 2–3 weeks (northern hemisphere; later in cold climates, earlier in warm ones) |
| Wind tolerance | Moderate |
| Pollinator value | High |
| Edible | Yes: cooked nuts |
| Native to | Southern Europe, Turkey and the Caucasus |
| Common in gardens of | 🇫🇷 France, 🇬🇧 United Kingdom |
Is Sweet chestnut toxic?
- People: not known to be toxic
- Cats: not known to be toxic
- Dogs: not known to be toxic
Nuts are edible; raw nuts are hard and unpalatable and burrs can injure paws.
If a child or pet may have eaten part of a plant, call a poison centre or vet straight away.
Companion planting: what to grow with Sweet chestnut
No well-documented helpful pairing. Group it with plants that like full sun and moderate water.
Shared pests and diseases
- Phytophthora ramorum: Sudden oak death pathogen; rhododendron, viburnum, camellia and pieris spread it to oaks and larch. Evidence B
Questions about Sweet chestnut
- How far apart should I plant Sweet chestnut?
- About 12 m (39 ft) apart, centre to centre. A mature plant spreads 10–15 m (33–49 ft).
- Does Sweet chestnut need full sun?
- Full sun: at least 7 hours of direct sun a day.
- How much water does Sweet chestnut need?
- Moderate water. Drought tolerance is moderate and waterlogging tolerance none.
- How cold-hardy is Sweet chestnut?
- It tolerates about -25 °C (-13 °F) once established, roughly USDA zone 5.
- When does Sweet chestnut flower?
- From about June for 2–3 weeks (northern hemisphere; later in cold climates, earlier in warm ones).
- Is Sweet chestnut poisonous to cats and dogs?
- For cats it is not known to be toxic; for dogs not known to be toxic; for people not known to be toxic. Nuts are edible; raw nuts are hard and unpalatable and burrs can injure paws.
- What grows well with Sweet chestnut?
- There is no well-documented companion pairing for Sweet chestnut. Group it with plants that like the same sun (full sun) and water (moderate).
Sources and evidence
Evidence grade C (C: plausible, mixed evidence).
- RHS Plant Finder, Royal Horticultural Society
- University extension gardening guides (general), Various land-grant university extensions
- Plants of the World Online (taxonomy, native range), Royal Botanic Gardens, Kew
- Plants For A Future database, PFAF
- Fruit & Nut Research and Information Center: chilling requirements by species and cultivar, University of California, Davis
Notes and assumptions
- Lime-intolerant; cross-pollinated by wind and insects, so plant more than one; chill roughly 400-900 hours (estimate); chestnut blight and ink disease are threats in some areas.
Reference values for planning, not horticultural, veterinary or medical advice. Varieties, soils and local climates differ: check with a local nursery or extension service.
Related plants
- English oak Quercus robur
- Southern live oak Quercus virginiana
- European beech Fagus sylvatica
- Holm oak Quercus ilex
- Coast live oak Quercus agrifolia
- Cork oak Quercus suber
- Northern red oak Quercus rubra
- White oak Quercus alba