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Variety traits

Winter hardiness

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.

Sources10

Breakdown by crop

Winter Hardiness of Roses 555 Winter hardiness of common wheat 220 Winter hardiness of apple trees 188 Winter Hardiness — Hydrangea macrophylla 187 Pear Winter Hardiness 123 Winter hardiness — perennial ryegrass 120 Winter Hardiness of Lily 91 Winter hardiness of winter rapeseed 81 Peach winter hardiness 71 Plum Winter Hardiness 65 Winter Hardiness of Clematis 61 Grapevine Winter Hardiness 56 Winter hardiness of winter barley 56 Winter hardiness — garden strawberry 52 Winter hardiness of sweet cherry 48 Tulip winter hardiness 42 Heuchera winter hardiness 40 Winter Hardiness of Alfalfa 39 Chrysanthemum winter hardiness 39 Winter hardiness of triticale 36 Winter Hardiness of Apple 36 Winter hardiness of Hydrangea serrata 36 Grapevine Winter Hardiness 35 Winter hardiness of apricot 35

Found in these crops

Rose 1 062 Apple 843 Bread wheat 657 Lily 410 European pear 348 Bigleaf hydrangea 315 Peach 264 Rapeseed 258 European plum 245 Grapevine 229 Perennial ryegrass 224 Sweet cherry 223

Varieties that feature this in their description

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.

King Fischer

Withdrawn

Felicia Cass. · Felicia

FISCHER PETER

1 record

HUICO02

Withdrawn

Ceanothus impressus Trel. · Santa Barbara ceanothus

Huisman Boomkwekerij B.V.

1 record

Kiko

Terminated

Chrysanthemum L. · Chrysanthemum

Chrysanthemum Breeders Association Research B.V.

1 record

Kyoto

Terminated

Hibiscus rosa-sinensis L. · Chinese hibiscus

Coöperatieve Vereniging Werkgroep Hibiscus U.A.

1 record

Lafper

Active

Perovskia atriplicifolia Benth. · Russian sage

Frédéric Lafontaine

1 record

Jaimaica

Terminated

Dahlia Cav. · Dahlia

JASK HOLDING APS

1 record

Kielapro

Terminated

Lavandula angustifolia Mill. · English lavender

Kieft Bloemzaden B.V.

1 record

Korsosoma

Active

Rosa L. · Rose

WILHELM-ALEXANDER KORDES

1 record

KORPOT013

Terminated

Rosa L. · Rose

Wilhelm Kordes,Tim-Hermann Kordes,Margarita Kordes

1 record

Kolmaori

Withdrawn

Salvia xjamensis J. Crompton · Jame sage

Kolster Holding B.V.

1 record

Jolavwhi

Withdrawn

Lavatera x clementii Cheek

Hyfryd Plants

2 records

INNERYOZ

Terminated

Erysimum L. · Wallflower

Silvia Hofmann

1 record

HOOGI036

Active

Lycium barbarum L. · Goji berry

Mark Sebastiaan Hoogenraad

1 record

Korphieso

Application submitted

Rosa L. · Rose

WILHELM-ALEXANDER KORDES

1 record

HOLKAORI

Active

Dianthus superbus L. · Large pink

Kazuyuki Shishido

1 record

HL 1040)

Active

Helleborus niger x Helleborus x hybridus

Josef Heuger

1 record

Kamosere Gokigenyo

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Toyokazu Ichie

1 record

Korjeafra

Active

Rosa L. · Rose

WILHELM-ALEXANDER KORDES

1 record

KORirrlaus

Application submitted

Rosa L. · Rose

WILHELM-ALEXANDER KORDES

1 record

Hillmah

Application submitted

Mahonia nitens C. K. Schneid.

Hillier Nurseries Ltd

1 record

JS Stiletto

Active

Echinacea purpurea (L.) Moench · Purple coneflower

Spruyt Select CommV

1 record

Korintalam

Active

Rosa L. · Rose

WILHELM-ALEXANDER KORDES

1 record

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