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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.

Yoursula

Terminated

Chrysanthemum L. · Chrysanthemum

Wendy R Bergman

2 records

Yerseke

Active

Lilium L. · Lily

Vletter & Den Haan Beheer B.V

2 records

Zalina

Active

Calluna vulgaris (L.) Hull · Common heather

Kurt Kramer

3 records

Yellow Brush

Active

Lilium L. · Lily

Testcentrum voor Siergewassen B.V.

2 records

Yoduluth

Terminated

Chrysanthemum L. · Chrysanthemum

Vandenberg Cornelis P

2 records

WP21 MIN01

Active

Dianthus L. · Carnation

Whetman Plants International Limited

2 records

WP19 NAM02

Active

Dianthus L. · Carnation

Whetman Plants International Limited

2 records

Zosusk

Active

Clematis L. · Clematis

Wim Snoeijer

2 records

WP15 PIE43

Active

Dianthus x allwoodii hort. · Allwood pink

Plant Genetics International Ltd.

2 records

Zooct

Active

Clematis L. · Clematis

Wim Snoeijer

2 records

YAPROSE

Active

Penstemon Schmidel. · Beard Tongue

Frederic C. Yates

2 records

Winter Darling

Active

Helleborus x ericsmithii

P.C.M. Olsthoorn Holding B.V.

2 records

Winterbells

Active

Helleborus L. · Christmas Rose

K. Sahin Zaden B.V.

2 records

Zo23015

Active

Clematis L. · Clematis

van Zoest Jos

2 records

Wonderful Wampee

Active

Achillea millefolium L. · Yarrow

Zwaan Michiel|Alphen aan den-Rijn, NL

2 records

Wonderful Day

Active

Astilbe x arendsii H. Junge · Arends astilbe

Verduin Harrie

2 records

White Royal

Application submitted

Campanula portenschlagiana Schult. · Dalmatian bellflower

Holde Charlotte|Odense N, DK

2 records

Wellmax

Active

Clematis texensis Buckley · Crimson clematis

P. van Well en Zonen B.V.

2 records

White Heaven

Active

Agapanthus L'Hér. · Lily of the Nile

Anthonius P.M. Rijnbeek, C.T.J. de Jong

2 records

White Candles

Active

Lobelia siphilitica L. · Blue cardinal-flower

TERRA NOVA NURSERIES INC

2 records

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