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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.

Giel

Active

Hydrangea aspera Buch.-Ham. ex D. Don · Rough-leaved hydrangea

Giel P. J. Vullings, Boomkwekerij Coonen

2 records

HORT17

Active

Rhododendron simsii Planch. · Indica azalea

Hortibreed N.V.

2 records

Goris11

Active

Prunus laurocerasus L. · Cherry laurel

Kees Goris

3 records

Golden Panda

Active

Corydalis flexuosa Franch.

REUBEN HATCH^^^DIANA REECK^^^BILL JANSSEN

2 records

Golden Carpet

Active

Berberis thunbergii DC. · Japanese barberry

Michal Andrusiv

2 records

Jw Daisy's White

Terminated

Picea abies (L.) H. Karst. · Norway spruce

MR JEURISSEN LUCIEN

2 records

Frovit

Protection expired

Vitis L. · Grapevine

WEST DAVID

2 records

Harvington Rebekah

Active

Helleborus L. · Christmas Rose

Hugh L. Nunn^^^Elizabeth A. Nunn

2 records

Gold Cascade

Terminated

x Heucherella H. R. Wehrh. · Foamy bells

Janet N. Egger

2 records

Harmaxim

Active

Rosa L. · Rose

HARKNESS NEW ROSES LTD

2 records

Glow Sticks

Active

Festuca arundinacea Schreb. · Tall fescue

Schmidt Jeremy

2 records

Hokomabavi

Application submitted

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Kolster Holding B.V.^^^Horteve Breeding B.V.

2 records

Jolep 1

Active

Betula pendula Roth · Silver birch

Boomkwekerij John de Lepper

2 records

Giggling Smileyz

Active

Rudbeckia hirta L. · Black-eyed Susan

Nova Perenne B.V.

2 records

Jelvercaro

Active

Glandularia canadensis (L.) Nutt.

Uebelhart Georg

2 records

Kiastazuri

Active

Aster dumosus L. · Bushy aster

Andreas Niederländer

2 records

Jeanny

Terminated

Chrysanthemum L. · Chrysanthemum

Nicolaas P. Dekker

2 records

JanLim

Terminated

Artemisia vulgaris L.

Harnett Richard

2 records

Garho

Terminated

Gerbera L. · Gerbera

FLORIST HOLLAND B.V.

2 records

JS Blue Darkness

Active

Panicum virgatum L. · Switchgrass

Spruyt Select CommV

2 records

Hachmagic

Active

Rhododendron L. · Azalea

Holger Hachmann

2 records

Hachhans

Active

Rhododendron L. · Azalea

Holger Hachmann

2 records

Junior Fountain

Active

Phlox paniculata L. · Garden phlox

Vester Mart|Zwaanshoek, NL

2 records

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