Kolmasun
ActiveHypericum x inodorum Mill. · Tall tutsan
Kolster Beheer B.V.
Variety traits
Frost Hardiness of Hypericum x inodorum
Hypericum x inodorum Mill.
The ability of the Hypericum x inodorum root system to overwinter in the soil, ensuring spring regeneration of the aerial parts at temperatures ranging from -15 °C to -25 °C.
In the reference 4 varieties crop Tall tutsan, where this is mentioned in the description.
For Hypericum x inodorum, the frost hardiness rating corresponds to USDA zones 5 to 9, which in temperature terms represents a range of -15 °C to -25 °C. Plants capable of withstanding drops down to -25 °C are classified as highly frost-hardy for temperate climates.
At extreme temperatures, the aerial part of the crop often freezes back; however, the preservation of root system viability allows the plant to fully recover in the spring. In regions with severe winters, mulching is applied to protect the root system, and the practice of early spring pruning of frost-damaged shoots stimulates further development and flowering of the shrub.
General information about the subject — on the page Frost hardiness.
Varieties of Tall tutsan 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.