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Variety traits

Frost hardiness

Frost hardiness is the genetically determined ability of a plant to withstand exposure to sub-zero temperatures without tissue damage. This indicator reflects the critical temperature threshold beyond which the plant dies.

Mentioned in descriptions 11 978 varieties reference book.

Frost hardiness represents the ability of a plant organism to resist the impact of low sub-zero temperatures. It determines the critical threshold above which plant tissues undergo irreversible damage or death. Unlike overall winter hardiness, which also accounts for damping-off and the effects of thaws, frost hardiness focuses specifically on the cellular response to cold exposure.

This trait is genetically determined; however, its expression depends on the physiological state of the plant and the dynamics of external conditions. Frost hardiness is not a constant value: it increases during the period of deep winter dormancy and gradually decreases towards spring, as the plant loses its ability to resist cold due to dehardening.

The evaluation of frost hardiness during variety testing is conducted through laboratory freezing in controlled conditions or through long-term field observations of crop survival. For variety comparison, scoring scales, percentage of survival, or the determination of minimum permissible temperatures in degrees Celsius are used. Maximum realization of the innate genetic potential for frost hardiness is ensured by optimal sowing dates and adequate phosphorus-potassium fertilization in the autumn.

Sources10

Breakdown by crop

Frost resistance of roses 263 Frost Resistance — Hydrangea macrophylla 162 Grapevine Cold Hardiness 152 Lily Frost Hardiness 106 Apple Frost Resistance 84 Grapevine Cold Hardiness 78 Clematis Frost Resistance 71 Tulip frost resistance 64 Peach frost hardiness 52 Frost resistance — soft wheat 44 Frost Hardiness of Rhododendron 36 Frost resistance of Heuchera 36 Frost resistance of common heather 30 Frost Hardiness of Zantedeschia 29 Pear frost resistance 24 Frost Hardiness of Sweet Cherry 24 Apple Frost Resistance 24 Gladiolus frost resistance 24 Cold hardiness of fig 24 Chrysanthemum Frost Resistance 21 Plum Frost Resistance 19 Apricot frost resistance 19 Frost resistance — garden strawberry 19 Blueberry frost resistance 18

Found in these crops

Grapevine 301 Rose 193 Lily 150 Common grape vine 142 Apple 119 Tulip 112 Bigleaf hydrangea 82 Clematis 66 Peach 63 Bread wheat 56 Azalea 44 Highbush blueberry 42

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.

Panda

Active

Fargesia murielae (Gamble) T.P.Yi · Umbrella bamboo

Bent Olsen

2 records

Minta

Active

Chamaecyparis pisifera (Siebold & Zucc.) Endl. · Sawara cypress

Rietberg Henrik Christiaan Cozijn

2 records

Minpitto

Active

Pittosporum tenuifolium Gaertn. · Kohuhu

Hortival Diffusion S.A.S.

2 records

MINBEL252

Active

Echinacea purpurea x Echinacea tennesseensis

Henricus Maria Joseph Holtmaat

2 records

MVNG1901

Active

Geranium sanguineum L.

van Noort Marco

2 records

Methyra

Active

Hypericum L. · St. John's wort

Marc Etienne

2 records

MINCOFLA20

Active

Cotinus coggygria Scop. · European smoketree

Pineau Patrick

2 records

Meilathery

Active

Rosa L. · Rose

Meilland Alain A.|Antibes, FR

2 records

Meishamalo

Active

Rosa L. · Rose

Alain Antoine Meilland

2 records

MINSAM7

Active

Rhododendron molle (Blume) G. Don · Chinese azalea

Hortival Diffusion S.A.S.

2 records

Minkigold

Active

Actinidia chinensis Planch. · Kiwifruit

Marionnet S.A.R.L.

2 records

Masai

Active

Lilium L. · Lily

Vletter & Den Haan Beheer B.V

3 records

Orange Retz

Active

Carpinus betulus L. · European hornbeam

Jean Blondeau

2 records

Matina Yellow

Terminated

Chrysanthemum L. · Chrysanthemum

PARATY B.V.B.A

2 records

NICO1

Active

Erica nana Salisb.

Nicolandes E.A.R.L.

2 records

Merlot

Active

Echinacea purpurea (L.) Moench · Purple coneflower

Korlipara Harini|Canby, OR, US

2 records

NCDX2

Active

Deutzia x rosea (Lemoine) Rehder

Thomas G. Ranney

2 records

Meliro

Active

Vaccinium vitis-idaea L. · Lingonberry

Sierteeltkwekerij Maarten Bloemen V.O.F.

3 records

Manon

Active

Nandina domestica Thunb. · Heavenly bamboo

Andreas W.J. Boereboom

2 records

Melle

Active

Rhododendron L. · Azalea

Magda De Waele-De Baerdemaeker

2 records

MACANE002

Active

Anemone L. · Anemone

MacGregor Elizabeth / MacGregor Alasdair

2 records

Mingo

Active

Myrtus communis L. · Common myrtle

Michele Fazio

2 records

LISJO

Active

Cotinus coggygria Scop. · European smoketree

Liss Forest Nursery Ltd

2 records

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