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.
Prunus persica (L.) Batsch · Peach
Instytut Ogrodnictwa - Państwowy Instytut Badawczy
Pisum sativum L. · Pea
L CLAUSE S.A.
Prunus persica (L.) Batsch · Peach
Laurence Maillard, Arsene Maillard
Brassica oleracea L. (Collard Group) · Collard greens
Limagrain UK
Triticum durum Desf. · Durum wheat
Südwestdeutsche Saatzucht GmbH&Co.KG
Thuja occidentalis L. · Northern white-cedar
Wojciech Kapias
Chamaecyparis thyoides (L.) Britton et al. · Atlantic white cedar
Edens Creations B.V.
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Schroll Management ApS
Tulipa L. · Tulip
Hybris B.V.
Rhododendron obtusum (Lindl.) Planch. · Hirado azalea
Paul Wensing
Escallonia laevis (Vell.) Sleumer · Escallonia
Ian J. Ashton
Rhododendron obtusum (Lindl.) Planch. · Hirado azalea
Paul Wensing
Lilium L. · Lily
Vletter & Den Haan Beheer B.V
Gladiolus L. · Gladiolus
Coöperatieve Kwekersvereniging "For Ever" U.A.
Rudbeckia hirta L. · Black-eyed Susan
Nova Perenne B.V.
Calluna vulgaris (L.) Hull · Common heather
Edens Creations B.V.
Eucomis L’Her. · Pineapple lily
Janet N. Egger
Heuchera L. · Coral Flower
Diederik Scheys
Rhododendron obtusum (Lindl.) Planch. · Hirado azalea
Paul Wensing
Tulipa L. · Tulip
Testcentrum voor Siergewassen B.V.
Gladiolus L. · Gladiolus
Coöperatieve Kwekersvereniging "For Ever" U.A.
Lilium L. · Lily
Testcentrum voor Siergewassen B.V.
Hyacinthus orientalis L. · Common hyacinth
Cornelis Johannes Maria Prins
Ligustrum obtusifolium Siebold & Zucc. · Amur privet
Instituut voor Landbouw- en Visserijonderzoek (ILVO) Eenheid Plant