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.

Evipo069

Active

Clematis L. · Clematis

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

3 records

Evipo052

Active

Clematis L. · Clematis

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

3 records

Evipo074

Active

Clematis L. · Clematis

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

3 records

Curlew

Active

Vicia faba L. · Broad bean

Norddeutsche Pflanzenzucht Hans-Georg Lembke KG

5 records

Evipo070

Active

Clematis L. · Clematis

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

3 records

Evipo002

Active

Clematis L. · Clematis

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

3 records

Crown Jewels

Active

Hibiscus L. · Hibiscus

FLEMING DAVID W.^^^Gretchen Zwetzig

3 records

Evening Light

Active

Styrax japonicus Siebold & Zucc. · Japanese snowbell

Kolster Henny

3 records

Evening Glow

Active

Coprosma J.R. et G. Forst. · Mirror bush

Peter John Fraser

3 records

ET CRX02

Active

Carex L. · Sedge

Noordhuis Bart / Bisschop Elisabeth

4 records

Chocolate Ruffles

Active

Heuchera L. · Coral Flower

Heims, Dan M.|Portland, OR

3 records

Dixie Sun

Active

Echinacea Moench. · Coneflower

Korlipara Harini

4 records

COSEH 1050

Active

Helleborus niger L. · Christmas rose

Josef Heuger

3 records

EPB 24

Active

Helleborus x hybridus hort. ex Voss · Lenten rose

RODNEY DAVEY|LYNDA WINDSOR

3 records

Encanto Orange

Active

Begonia L. · Begonia

ter Laak Wendela Antoinette|Amstelveen, NL

3 records

Evipo076

Active

Clematis L. · Clematis

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

3 records

Competition

Active

Lilium L. · Lily

Testcentrum voor Siergewassen B.V.

5 records

Desert Red

Active

Hylotelephium telephium (L.) H. Ohba · Orpine

Janet N. Egger

4 records

Desert Coral

Active

Coreopsis L. · Tickseed

Korlipara Harini

4 records

Delgramau

Active

Rosa L. · Rose

Société Nouvelle Pépinières et Roseraies Georges Delbard S.A.S.

3 records

DWAgHyb18

Active

Agapanthus L'Hér. · Lily of the Nile

DE WET PLANT BREEDERS (PTY) LTD

3 records

Cappuccino

Active

Hybrid between Astilbe x arendsii and Astilbe japonica

van de Meer Hans

3 records

EPB 20

Active

Helleborus x hybridus hort. ex Voss · Lenten rose

RODNEY DAVEY|LYNDA WINDSOR

3 records

Champagne

Active

Scabiosa ochroleuca L.

Petrus Hendricus Oudolf

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.