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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.

Purple Illusion

Terminated

Veronica spicata L. · Spiked speedwell

Hans A. Hansen

1 record

Poulcharm

Terminated

Rosa L. · Rose

Poulsen Roser A/S

1 record

Raoslo

Terminated

Hydrangea L. · Hydrangea

RAMPP JUNGPFLANZEN GMBH & CO. VERTRIEBS KG

1 record

Poulanlis

Terminated

Rosa L. · Rose

Poulsen Roser A/S

1 record

Pheni Vio

Withdrawn

Penstemon Schmidel. · Beard Tongue

GOLDSMITH SEEDS

1 record

Porthos

Active

Hybrids between Prunus fruticosa Pall. and Prunus cerasus L.

Robert H. Bors

2 records

Plum Dazzled

Active

hybrids between Hylotelephium cauticola (Praeger) H. Ohba and Hylotelephium telephium (L.) H. Ohba

Christopher M Hansen

1 record

PEACASINO

Terminated

Rosa L. · Rose

Colin Pearce

1 record

POULYC002

Terminated

Rosa L. · Rose

Poulsen Roser A/S

1 record

POULTY041

Application submitted

Rosa L. · Rose

Poulsen Roser A/S

1 record

Partituur

Terminated

Gladiolus L. · Gladiolus

Coöperatieve Kwekersvereniging “Horizon” U.A.

1 record

PSDBH11301

Terminated

Campanula poscharskyana Degen · Trailing bellflower

Peter van de Pol

1 record

POULPAH117

Application submitted

Rosa L. · Rose

Poulsen Roser A/S

1 record

POULREN018

Terminated

Rosa L. · Rose

Poulsen Roser A/S

1 record

Podaras 15

Active

Hybrids between Buddleja alternifolia Maxim. and Buddleja davidii Franch.

Cornell University

1 record

Poetry

Terminated

Rhododendron simsii Planch. · Indica azalea

Wendy Bergman

1 record

Penta

Active

Prunus dulcis (Mill.) D. A. Webb · Almond

José Egea Caballero^^^Federico Dicenta López-Higuera^^^Encarnación Ortega Pastor^^^Pedro Martínez Gómez

1 record

POULPAH023

Terminated

Rosa L. · Rose

Poulsen Roser A/S

1 record

Pevé Ollie

Terminated

Acer palmatum Thunb. · Japanese maple

MAATSCHAP PIET VERGELDT

1 record

NR18

Active

Deutzia

Ian J. Ashton

1 record

POULCAS027

Terminated

Rosa L. · Rose

Poulsen Roser A/S

1 record

Party Streamers

Application submitted

Hosta Tratt. · Hosta

Hans A. Hansen

1 record

Pink Crystal

Terminated

Hylotelephium spectabile (Boreau) H. Ohba · Ice plant

TERRA NOVA NURSERIES INC

1 record

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