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.

EVIPO108

Active

Clematis L. · Clematis

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

1 record

HUICO

Withdrawn

Ceanothus impressus Trel. · Santa Barbara ceanothus

Huisman Boomkwekerij B.V.

1 record

Gomera

Active

Lilium L. · Lily

Pergola Serviceres B.V.

1 record

HUIBLU

Active

Exochorda racemosa (Lindl.) Rehder

Huisman Boomkwekerij B.V.

1 record

Firestars Scorchio

Active

hybrids between Crocosmia masoniorum (L. Bolus) N. E. Br. and Crocosmia paniculata (Klatt) Goldblatt

Paul Lewis

1 record

Golden Angel

Application submitted

Ilex x meserveae S. Y. Hu · Meserve holly

Eike Helmers

1 record

GEUS0813

Active

Rosa L. · Rose

Select Breeding B.V.

1 record

EVEBLANC

Terminated

Rosa L. · Rose

Les Roses Anciennes André Eve S.A.S.

1 record

Honeymaker

Active

Hedera helix L. · Common ivy

Boomkwekerij Van Colen

1 record

Holy Grail

Active

Hibiscus coccineus x Hibiscus moscheutos L.

Hans A. Hansen

1 record

HLR 200

Terminated

Helleborus x hybridus hort. ex Voss · Lenten rose

Nis van der Horst

1 record

HYBHS23159

Withdrawn

Helichrysum italicum (Roth) Gussone · Curry plant

HYBRIDA S.R.L

1 record

Frozen Queen

Active

Zantedeschia Spreng. · Arum-lily

BB Plant B.V.

1 record

HSPS22

Application submitted

Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven

Plant Select N.V.

1 record

HSOPR015

Active

Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven

Plant Select N.V.

1 record

Falernian Grapes

Application submitted

Paeonia L. · Peony

Peony Shop Holland V.O.F.

1 record

Frans Hals

Terminated

Lilium L. · Lily

Vletter & Den Haan Beheer B.V

1 record

FLSAX19605

Active

Saxifraga x arendsii Engl. · Arends saxifrage

Florensis B.V.

1 record

FLORVSRO1

Active

Veronica spicata L. · Spiked speedwell

Florensis B.V.

1 record

FLORSERODL

Withdrawn

Hylotelephium telephium (L.) H. Ohba · Orpine

Florensis B.V.

1 record

HOOGI025

Active

Thuja occidentalis L. · Northern white-cedar

Mark Sebastiaan Hoogenraad

1 record

HBHP05

Withdrawn

Hydrangea anomala D. Don subsp. petiolaris (Siebold & Zucc.) E. M. McClint. · Climbing hydrangea

Huisman Boomkwekerij B.V.

1 record

Herbstzauber

Terminated

Rhododendron degronianum Carrière subsp. yakushimanum (Nakai) H. Hara

HEINZ J.A. GUYENS

1 record

Hazel

Withdrawn

Lavandula L. · Lavender

WYVEE Horticultural Services Pty Ltd

1 record

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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.