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.

Evipo061

Active

Clematis L. · Clematis

Poulsen Roser A/S^^^Raymond J. Evison Ltd.

3 records

Evipo029

Active

Clematis L. · Clematis

Poulsen Roser AS, DK - 3480 Fredensborg

3 records

Hortmagreclo

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Horteve Breeding B.V.

3 records

Hortmaflam

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Horteve Breeding B.V.

3 records

Everest

Active

Carex oshimensis Nakai · Oshima sedge

Patrick Fitzgerald, Fitzgerald Nurseries

3 records

Everdi

Active

Carex oshimensis Nakai · Oshima sedge

Patrick Fitzgerald

3 records

Fireball

Active

Hibiscus L. · Hibiscus

Fleming's Flower Fields Inc.

3 records

Honky Tonk

Active

Astilbe Buch.-Ham. ex D. Don · False goat's beard

Verduin Henricus Gijsbertus Johannes

3 records

Garnikki

Active

Gerbera L. · Gerbera

JAN L. EVELEENS

3 records

Holibel

Active

Hydrangea L. · Hydrangea

Jacobus Gerardus Hofstede|Wilhelmus Jacobus Gerardus Hofstede

3 records

HM 1216

Active

Helleborus lividus Aiton x Helleborus niger L. x Helleborus x hybridus hort. ex Voss

Josef Heuger

3 records

HL 1042

Active

Helleborus niger x Helleborus x hybridus

Josef Heuger

3 records

GERFOS

Active

Geranium L. · Crane's Bill

Robin Moss|Cyril Foster

3 records

G 210

Active

Malus Mill. · Apple

Plants for Europe Ltd

4 records

HGC Joshua

Active

Helleborus niger L. · Christmas rose

Josef Heuger

3 records

Fandango

Active

Heuchera L. · Coral Flower

Janet N. Egger

3 records

HERTN042

Active

x Heucherella H. R. Wehrh. · Foamy bells

Gossett Gary J.|Portland, OR, US

3 records

Florphfaro

Active

Phlox subulata L. · Creeping phlox

Florensis B.V.

3 records

Hercules

Active

Heuchera L. · Coral Flower

Oudshoorn Hubertus Gerardus

3 records

FSDD2117

Active

Delosperma nubigenum (Schltr.) L. Bolus · Hardy yellow ice plant

NISHIKAWA KOICHIRO

3 records

HBA208902

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Hydrangea Breeders Association B.V.

3 records

Evipo016

Active

Clematis L. · Clematis

Poulsen Roser A/S^^^Raymond J. Evison Ltd.

3 records

Eccentric

Active

Echinacea purpurea (L.) Moench · Purple coneflower

van Noort Marco

3 records

FLORACHRE1

Active

Achillea millefolium L. · Yarrow

Florensis B.V.

3 records

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Variety traits

Maturity group 89 063
Yield 67 000
Vigor 53 548
Plant height 51 504
Lodging 50 198
Taste and aroma 36 010
Variety origin 29 523
Productivity 27 845

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Text source

This summary is compiled from the publications listed in the sources and verified by an editor. It contains no legally significant information; it provides agronomic context for registry data rather than the registry data itself.