Xxl White Heaven
TerminatedHibiscus moscheutos L. · Crimson-eyed rose mallow
Green Works International B.V.
Variety traits
Frost Hardiness of Swamp Rose Mallow
Hibiscus moscheutos L.
The frost hardiness of Hibiscus moscheutos characterizes the ability of its root system and renewal buds to withstand temperatures from -25°C to -34°C, which corresponds to USDA zones 4 through 9.
In the reference 3 varieties crop Crimson-eyed rose mallow, where this is mentioned in the description.
Hibiscus moscheutos is a herbaceous perennial whose aerial parts die back annually after the first frosts; therefore, frost hardiness refers specifically to the root system overwintering in the soil. The plant is capable of maintaining viability at temperatures down to -34°C, while the safety threshold without critical damage is considered to be in the range of -25°C to -30°C.
The high frost hardiness of the crop results in a late emergence from dormancy, which occurs only after the soil has warmed significantly in the spring. Young first-year plants possess less resistance compared to mature specimens, and hilling or mulching of the root zone is recommended to improve survival in conditions of low-snow winters or extreme frosts.
General information about the subject — on the page Frost hardiness.
Varieties of Crimson-eyed rose mallow 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.