Variety traits

Frost resistance of Heuchera

Heuchera L.

This trait is characterized by the perennial's resistance to winter temperatures, classified according to USDA zones (predominantly zone 4, down to –34.4 °C). The primary factor for survival is the prevention of root system waterlogging and protection of the root crown.

In the reference 36 varieties crop Coral Flower, where this is mentioned in the description.

Most Heuchera cultivars correspond to USDA frost resistance zone 4, which implies tolerance to temperatures down to –34.4 °C. However, individual temperature survival thresholds are noted for specific species and cultivars, and in some cases, critical levels may be limited to –12 °C depending on growing conditions.

In an agrotechnical context, the risk of winter crop loss is more often caused by crown rot due to stagnant meltwater rather than the impact of absolute low temperatures. The presence of effective drainage, the use of mulch to protect the root system, and preventing the exposure of the root crown are the determining factors for successful overwintering. The evergreen or semi-evergreen vegetation type involves the natural dieback of part of the foliage at low temperatures, which does not indicate low winter hardiness of the plant.

General information about the subject — on the page Frost hardiness.

Sources8

Varieties of Coral Flower mentioned in the description

Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.