Chestnut — Chinese (Castanea mollissima) – hardiness zones in USDA, RHS, Canadian & Australian systems

Smaller, more compact chestnut species with high natural resistance to chestnut blight. The standard nut chestnut for North American gardens.

Hardiness ratings

Chestnut — Chinese hardiness across the four zone systems
System	Rating	Temperature range	How to read it
USDA hardiness zone	Zone 4–8	−34.4 °C to −6.7 °C	Plant tolerates down to this zone
RHS hardiness rating	H7	down to −20 °C	Plant needs at least this level of cold tolerance
Canadian plant hardiness zone	Zone 4–8	−29 °C to −1 °C	Plant tolerates down to this zone
Australian (ANBG) zone	Zone 1–4	−15 °C to 5 °C	Plant tolerates down to this zone

Blight resistance makes it the practical choice in regions where Cryphonectria parasitica is present
Cross-pollination required; bears nuts from around 5–7 years