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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.

Fuego

Active

Helenium autumnale L. · Common sneezeweed

ARIE BLOM

2 records

Frozen Kristof

Active

Helleborus orientalis Lam. · Lenten rose

Helleborus B.V.

2 records

Geus4611

Active

Rosa L. · Rose

Select Breeding B.V.

2 records

Gaucho

Active

Lilium L. · Lily

Testcentrum voor Siergewassen B.V.

2 records

Elvera

Active

Weigela Thunb. · Bush Honeysuckle

Herman Geers Handelskwekerij B.V.

2 records

FS 21-248

Application submitted

Delosperma nubigenum (Schltr.) L. Bolus · Hardy yellow ice plant

Koichiro Nishikawa

2 records

Danish Delight

Active

Agastache Clayt. ex Gronov. · Giant hyssop

Tina Møller

2 records

Fireworks

Active

Heuchera L. · Coral Flower

TERRA NOVA NURSERIES INC

2 records

Druzhba

Active

Vitis L. · Grapevine

ALIEV ARIF MUZAFAROVICh / KOSTRIKIN IVAN ALEKSANDROVICh / IVANOV JORDAN / VYLChEV VASIL / MUZYChENKO BORIS ALEKSANDROVICh

2 records

Doudeli

Active

Clematis montana Buch.-Ham. ex DC. · Anemone clematis

Robinson Charles Mitchell , Lorna Mildred Mitchell

2 records

Doroso

Active

Lilium L. · Lily

Vletter & Den Haan Beheer B.V

2 records

EVIPO088

Active

Clematis L. · Clematis

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

2 records

EVIPO084

Active

Clematis L. · Clematis

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

2 records

EVIPO028

Active

Clematis L. · Clematis

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

2 records

EVIPO024

Active

Clematis L. · Clematis

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

2 records

ET EPB 731

Active

Helleborus orientalis x Helleborus x ericsmithii

Eternal Plant Boijl B.V.

2 records

COSEH 8000

Active

Helleborus L. · Christmas Rose

Josef Heuger

2 records

Dicwitness

Protection expired

Rosa L. · Rose

Dickson Nurseries Ltd

2 records

Evolution Pop Corn

Active

Nerium oleander L. · Oleander

Almendreta Plantas y Cultivos S.L.

2 records

Devon Cream

Active

Jasminum officinale L. · Common Jasmine

Clive Parker^^^Joanne Read

3 records

Cloud Nine

Active

Geranium L. · Crane's Bill

Helen Warrington

2 records

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