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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.

Julia

Active

Hybrids between Echinacea purpurea (L.) Moench and Echinacea paradoxa (Norton) Britton

ARIE BLOM

2 records

ISIAJ

Active

Hybrieds between Acer palmatum and Acer pseudosieboldianum

Early Morning LLC dba Iseli Nursery

2 records

Isabella

Active

Trifolium repens L. · White clover

Bent Juhl Jensen

2 records

H215906

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Hydrangea Breeders Association B.V.

2 records

Hibani

Active

Prunus laurocerasus L. · Cherry laurel

Boomkwekerij Huijbregts

3 records

Hgc Jericho

Active

Helleborus L. · Christmas Rose

Josef Heuger

2 records

Hedda

Active

Ribes nigrum L. · Blackcurrant

Sagaplant AS, N-3812 Akkerhaugen

4 records

JSROHO

Active

Echinacea purpurea (L.) Moench · Purple coneflower

Spruyt Select CommV

2 records

Heartbreaker

Active

Veronica L. · Speedwell

JOH. VAN NIEKERK

2 records

Josalig 1

Active

Ligustrum ovalifolium Hassk.

Josa Selecties B.V.

2 records

HARJANGLE

Active

Rosa L. · Rose

R HARKNESS and CO LTD

3 records

Intergoubom

Active

Rosa L. · Rose

Interplant Roses B.V

2 records

INSEDYELCU

Active

Sedum L. · Ice Plant

Silvia Hofmann

2 records

Funny Girl

Active

Lilium L. · Lily

Vletter & Den Haan Beheer B.V

2 records

INNEMPINLE

Active

Nemesia strumosa x Nemesia fruticans

Silvia Hofmann

2 records

Jacrappy

Active

Rosa L. · Rose

JACKSON and PERKINS WHOLESALE INC

2 records

Jacks Gold

Active

Brunnera macrophylla (Adams) I. M. Johnst. · Siberian bugloss

Anthonius P.M. Rijnbeek

2 records

Izbrannitsa

Active

Malus domestica (Suckow) Borkh. · Apple

VARTAPETYaN VALENTINA VASIL'EVNA / ISAEV SERGEJ IVANOVICh / LIMBERGER GLEB E'DUARDOVICh

3 records

Gold Twin

Active

Lilium L. · Lily

De Jong Beheer B.V.

2 records

ISIID

Active

Hybrieds between Acer palmatum and Acer pseudosieboldianum

Early Morning LLC dba Iseli Nursery

2 records

Felice

Active

Lavandula angustifolia Mill. · English lavender

Paulus P. M. van der Salm

2 records

Golden Triumph

Terminated

Buxus microphylla Siebold & Zucc. · Littleleaf box

HENDRIK KOLSTER

2 records

Fashion Show

Active

Lilium L. · Lily

Testcentrum voor Siergewassen B.V.

2 records

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