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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.

HARJOLINA

Active

Rosa L. · Rose

HARKNESS NEW ROSES LTD

3 records

Harvest Moon

Active

Echinacea purpurea (L.) Moench · Purple coneflower

IT Saul Plants LLC

2 records

Hilvulca

Terminated

Dianthus caryophyllus L. · Carnation

HilverdaKooij B.V

2 records

Harentente

Application submitted

Rosa L. · Rose

HARKNESS NEW ROSES LTD

2 records

FLORACHYE2

Active

Achillea millefolium L. · Yarrow

Florensis B.V.

2 records

Hareden

Protection expired

Rosa L. · Rose

HARKNESS NEW ROSES LTD

2 records

HARPULSE

Active

Rosa L. · Rose

HARKNESS NEW ROSES LTD

2 records

Hilredbu

Terminated

Dianthus caryophyllus L. · Carnation

HilverdaKooij B.V

2 records

Harfracas

Protection expired

Rosa L. · Rose

HARKNESS NEW ROSES LTD

2 records

Harflax

Active

Rosa L. · Rose

HARKNESS NEW ROSES LTD

3 records

Hachrosa

Active

Dasiphora fruticosa (L.) Rydb. subsp. fruticosa · Shrubby cinquefoil

Holger Hachmann

2 records

HG01

Active

Papaver orientale L. · Oriental poppy

Oudshoorn Herbert

2 records

Habego

Active

Hippophae rhamnoides L. · Sea buckthorn

Hans Joachim Albrecht

2 records

HEUPIRE030

Active

x Heucherella H. R. Wehrh. · Foamy bells

Joke Dragt

3 records

Fireberry

Active

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

A. VERSCHOOR HORTICULTURE IMPORT-EXPORT B.V

2 records

Filigree Lace

Active

Betula pendula Roth · Silver birch

TERRA NOVA NURSERIES INC

2 records

Heartbeat

Active

Papaver L. · Poppy

DeWelt James Peter|Atascadero, CA, US

2 records

Guardia

Active

Lilium L. · Lily

Vletter & Den Haan Beheer B.V

2 records

Finchy

Active

Skimmia japonica Thunb. · Japanese skimmia

Boomkwekerij Vink Beugen B.V.

2 records

Dynamix

Active

Lilium L. · Lily

Testcentrum voor Siergewassen B.V.

2 records

Havana

Active

Heuchera L. · Coral Flower

Janet N. Egger

2 records

GRHP14

Active

Hydrangea paniculata Siebold · Panicled hydrangea

Guido Rouwette

2 records

Harprior

Active

Rosa L. · Rose

HARKNESS NEW ROSES LTD

3 records

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