Variety traits
Frost resistance of Hibiscus rosa-sinensis
Hibiscus rosa-sinensis L.
Hibiscus rosa-sinensis is a tropical plant lacking the genetic mechanisms for adaptation to sub-zero temperatures and dormancy. The crop dies at temperatures of –2°C and experiences severe physiological stress at temperatures as high as +10…+13°C.
In the reference 5 varieties crop Chinese hibiscus, where this is mentioned in the description.
The concept of frost resistance is not applicable to this crop, as the species is incapable of acclimatization and hardening. In scientific research, critical survival thresholds are used instead of standard scales, according to which a temperature of –2°C is lethal to plant tissues.
The plant is susceptible to chilling injury at temperatures below +10…+13°C, which manifests as metabolic slowdown, impaired root water uptake, and leaf drop. The +7…+10°C temperature range is a critical limit at which immediate relocation of the plant to protected ground is required to maintain its viability.
General information about the subject — on the page Frost hardiness.
Varieties of Chinese hibiscus 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.
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