Variety traits
Winter hardiness is a complex indicator of a variety's ability to remain viable throughout the winter and early spring periods, including resistance to frost and other environmental stress factors.
Mentioned in descriptions 27 261 varieties reference book.
Winter hardiness is a complex plant characteristic that includes resistance to freezing, smothering, waterlogging, frost heaving, and winter desiccation. Unlike frost resistance, which is limited to tolerance of low temperatures, winter hardiness takes into account the entire spectrum of adverse effects that lead to plant death or damage during the cold period.
The winter hardiness of a variety is evaluated using methods of field assessment of crop conditions after winter, employing scoring scales, as well as laboratory studies. The latter include direct freezing of plant monoliths, biochemical analyses of sugar accumulation, verification of the viability of the tillering node, and the use of genetic markers to determine resistance.
The level of winter hardiness depends on the genetic potential of the variety, the plant's ability to harden, agronomic cultivation practices, and the microclimate characteristics of a specific site. When choosing a variety, one should focus on regionalized forms, bearing in mind that the resistance indicator is relative and requires comparison with local standards and growing conditions.
Selection based on the description text, not official resistance ratings: such data is not available in registers. Mention indicates that the trait is discussed in the variety's sources; see the variety's profile for details on what is specifically stated.
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Information regarding the breeder received in the contribution to CPVO :Hogg T.
Hydrangea paniculata Siebold · Panicled hydrangea
Information regarding the breeder received in the contribution to CPVO :Zwijnenburg P.
Mespilus germanica L. · Medlar
Hydrangea aspera Buch.-Ham. ex D. Don · Rough-leaved hydrangea
Information regarding the breeder received in the contribution to CPVO :Rowallane Garden
Bromus inermis Leyss. · Smooth brome
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Information regarding the breeder received in the contribution to CPVO :Wädenswil
Vitis vinifera L. · Common grape vine
Allium cepa L. · Onion
Ziziphus jujuba Mill. · Jujube
Hydrangea quercifolia W. Bartram · Oakleaf hydrangea
Information regarding the breeder received in the contribution to CPVO :De Belder R. & J.
Rosa L. · Rose
Rosa L. · Rose
Malus domestica (Suckow) Borkh. · Apple
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
No information of breeder available for this variety
Vitis vinifera L. · Common grape vine
Hydrangea L. · Hydrangea
Information regarding the breeder received in the contribution to CPVO :Arène L., Cadic A., Davasse J.P.
Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
Information regarding the breeder received in the contribution to CPVO :Sugaya Eiko
Brassica napus L. · Rapeseed
Rhododendron L. · Azalea
Astilbe Buch.-Ham. ex D. Don · False goat's beard
Hydrangea anomala D. Don subsp. petiolaris (Siebold & Zucc.) E. M. McClint. · Climbing hydrangea
Information regarding the breeder received in the contribution to CPVO :Spring Meadow Nursery
Allium cepa L. · Onion
Malus Mill. · Apple
Pyrus communis L. · European pear