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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.

Hibou noir

Active

Vitis vinifera L. · Common grape vine

FR
1 record

Hellikki

Terminated

Rhododendron molle (Blume) G. Don · Chinese azalea

NL
1 record

Herman

Active

Prunus domestica L. subsp. domestica · Plum

NL
1 record

Draps Wonder

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Information regarding the breeder received in the contribution to CPVO :Draps D.

FR
1 record

Fortuna

Active

Gladiolus L. · Gladiolus

NL
1 record

Delwimor

Active

Pyrus communis L. · European pear

IT
1 record

Forever & Ever

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Information regarding the breeder received in the contribution to CPVO :Trend Floral of Canada

FR
5 records

Excalibur

Active

Prunus domestica L. subsp. domestica · Plum

NL
1 record

Hauszwetsche

Active

Prunus domestica L. subsp. insititia (L.) C. K. Schneid. · Damson

NL
1 record

Harmony

Active

Hydrangea quercifolia W. Bartram · Oakleaf hydrangea

Information regarding the breeder received in the contribution to CPVO :McDaniel T. A.

FR
1 record

Defender

Protection expired

Rosa x rugotida Belder & Wijnands

NL
1 record

Harmat

Protection expired

Rosmarinus officinalis L. · Rosemary

HU
1 record

Flandria

Terminated

Medicago sativa L. · Alfalfa

SK
1 record

Hannibal

Active

Allium porrum L. · Leek

NL
1 record

Hakucho

Active

Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven

No information of breeder available for this variety

FR
1 record

Darts Little Dot

Active

Hydrangea paniculata Siebold · Panicled hydrangea

Information regarding the breeder received in the contribution to CPVO :Darthuizer

FR
1 record

Dárda

Active

Taxus baccata L. · European yew

HU
1 record

Guzal Kara

Active

Vitis vinifera L. · Common grape vine

SK
1 record

Gentian Dome

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Information regarding the breeder received in the contribution to CPVO :Steiniger

FR
1 record

Grandiflora Alba

Active

Hydrangea arborescens L. · Smooth hydrangea

No information of breeder available for this variety

FR
1 record

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