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 avium (L.) L. · Sweet cherry
Universita degli Studi di Bologna (IT)/C.R.P.V. Centro Ricerche Produzioni Vegetali - Societa Coop. (IT)
Lotus corniculatus L. · Bird's-foot trefoil
PICKSEED CANADA INC
Lilium L. · Lily
Mak Breeding Rights B.V.
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Vernon Glen Black
Allium porrum L. · Leek
NUNHEMS
Rosa L. · Rose
David J.C.Austin
Medicago sativa L. · Alfalfa
S.I.S Societa Italiana Sementi S.p.a.
Rosa L. · Rose
David J.C.Austin
Rosa L. · Rose
David C H Austin (GB)/Patricia J Austin (GB)
Linum usitatissimum L. · Common flax
PREMIUM CROPS
Prunus armeniaca L. · Apricot
Institut National de Recherche pour l'Agriculture l'Alimentation et l'Environnement (INRAE)
Lolium perenne L. · Perennial ryegrass
Aberystwyth University (IBERS)
Hydrangea arborescens L. · Smooth hydrangea
Wood Timothy D
Zantedeschia Spreng. · Arum-lily
Sande B.V.
Helleborus L. · Christmas Rose
Eternal Plants Boijl B.V.
Lilium L. · Lily
Nicolaas Aloysius Maria Mak
Rosa L. · Rose
Rosen Tantau KG
Rosa L. · Rose
Hans-Juergen Evers
Alstroemeria L. · Alstroemeria
Tas Marius
Lilium L. · Lily
Nicolaas Aloysius Maria Mak
Hibiscus moscheutos L. · Crimson-eyed rose mallow
Tan Alain
Vitis L. · Grapevine
LABORATORIO DE INVESTIGACION DE CULTIVOS HORTICOLAS DEL SERVICIO DE INVESTIGACION AGRICOLA
Senecio candidans DC.
MATIAS EDUARDO AVENDANO CEBALLOS
Malus domestica (Suckow) Borkh. · Apple
WILLIAM DAVID LANE