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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.

R7890A

Active

Lavandula angustifolia Mill. · English lavender

Martijn Baijens

2 records

ROWBLU

Active

Dierama K. Koch · wandflower

Diane L. Rowe

2 records

Poulpah116

Active

Rosa L. · Rose

Poulsen Roser A/S

2 records

Rosetta

Active

Hylotelephium telephium (L.) H. Ohba · Orpine

Janet N. Egger

3 records

ROBLEZ

Active

Rhododendron obtusum (Lindl.) Planch. · Hirado azalea

Robert Edward Lee

2 records

Purpleicious

Active

Veronica L. · Speedwell

Verschoor Jan|Haarlem, NL

2 records

Purity

Active

Echinacea purpurea (L.) Moench · Purple coneflower

Korlipara Harini|Canby, OR, US

2 records

Poulcy037

Active

Rosa L. · Rose

Poulsen Roser A/S

2 records

POULCY030

Active

Rosa L. · Rose

Poulsen Roser A/S

2 records

Richmond

Active

Lilium L. · Lily

Vletter & Den Haan Beheer B.V

2 records

Rianne

Active

Salvia x sylvestris L. · Wood sage

André de Gruyter B.V.

2 records

Royal Gems

Active

Hibiscus moscheutos L. · Crimson-eyed rose mallow

Fleming's Flower Fields Inc.

2 records

Samantha

Active

Erica carnea L. · Winter heath

Kurt Kramer

2 records

Power

Active

Delphinium L. · Larkspur

Firma Kwekerij Delphi V.O.F.

2 records

Renxolor

Active

Hydrangea paniculata Siebold · Panicled hydrangea

Jean Renault

2 records

Poulvo

Terminated

Clematis L. · Clematis

RAYMOND J. EVISON^^^POULSEN ROSER INTERNATIONAL S.A.R.L.

2 records

SAKOST8193

Terminated

Osteospermum L. · Osteospermum

Sakata Ornamentals Europe A/S

2 records

Red Twin

Active

Lilium L. · Lily

De Jong Beheer B.V.

2 records

Poulren047

Active

Rosa L. · Rose

Poulsen Roser A/S

2 records

POULTC006

Application submitted

Rosa L. · Rose

Poulsen Roser A/S

2 records

Poulren040

Active

Rosa L. · Rose

Poulsen Roser A/S

2 records

Poulren037

Active

Rosa L. · Rose

Poulsen Roser A/S

2 records

Red Star

Active

Pyracantha coccinea M. Roem. · Firethorn

Van der Sar - Vermaat

2 records

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