Variety traits

Frost resistance of Hibiscus syriacus

Hibiscus syriacus L.

The frost resistance of Hibiscus syriacus determines its suitability for landscape use and is evaluated on a five-point scale based on the degree of shoot frost injury and crown recovery capacity.

In the reference 8 varieties crop Rose of Sharon, where this is mentioned in the description.

To evaluate the winter hardiness of Hibiscus syriacus, a five-point scale is used, taking into account the condition of plants after overwintering, including the degree of damage to shoots down to the root collar. The minimum threshold for selecting promising cultivars capable of regular flowering is 3 points.

The species is able to withstand temperatures down to -29°C, which corresponds to USDA hardiness zone 5. In conditions of unstable winters and freeze-thaw cycles, shoot frost injury may occur; however, the high regenerative capacity allows the plant to recover its crown and bloom on current-season growth.

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

Sources8

Varieties of Rose of Sharon 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.