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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.

Deljaucien

Active

Rosa L. · Rose

Société Nouvelle Pépinières et Roseraies Georges Delbard S.A.S.

1 record

CIV64

Terminated

Fragaria x ananassa Duchesne ex Rozier · Garden strawberry

Michelangelo Leis^^^Gianfranco Castagnoli^^^Alessio Martinelli

2 records

Delice Feline

Active

Salvia chamaedryoides Cav. x Salvia greggii A. Gray

Jan De Busschere

1 record

ERFZ0002

Terminated

Erysimum linifolium (Pers.) J. Gay · Wallflower

Syngenta Crop Protection AG

1 record

DAVCOP04

Active

Spiraea japonica L. f. · Japanese meadowsweet

Jean-Paul Davasse

1 record

BRIHON

Terminated

Hydrangea quercifolia W. Bartram · Oakleaf hydrangea

DAVID A. JARZYNKA

1 record

Caluroso

Terminated

Lilium L. · Lily

De Jong Beheer B.V.

1 record

COUFLORI

Active

Hydrangea paniculata Siebold · Panicled hydrangea

Jacques Couturieux

1 record

Brancusi

Active

Lilium L. · Lily

Vletter & Den Haan Beheer B.V

1 record

C 12

Active

Prunus persica (L.) Batsch · Peach

SAT 9413 FRUTARIA

1 record

Cophanto

Active

Colocasia esculenta (L.) Schott · Taro

Brian's Botanicals

1 record

Cogoleto

Terminated

Lilium L. · Lily

Vletter & Den Haan Beheer B.V

1 record

Colombine

Withdrawn

Ligustrum japonicum Thunb. · Japanese privet

André Briant Jeunes Plants S.A.S.

2 records

Black Arrow

Application submitted

Agapanthus L'Hér. · Lily of the Nile

Johannes M.J. Zwetsloot

1 record

Cefdonpur

Terminated

Anisodontea elegans (Cav.) D.M. Bates

Martin Kunhardt

1 record

Cherry Helen

Terminated

Verbascum L. · Mullein

Dick Degenhardt

2 records

Bocomasglo

Application submitted

Viburnum plicatum Thunb. · Japanese snowball

Boot & Co. Boomkwekerijen B.V.

1 record

Dapple Dandy

Active

Prunus x limeixing (J. Y. Zhang & Z. M. Wang) Y. H. Tong & N. H. Xia

Floyd Zaiger

2 records

Dayglow Pink

Terminated

x Heucherella H. R. Wehrh. · Foamy bells

TERRA NOVA NURSERIES INC

1 record

Danny

Active

Calluna vulgaris (L.) Hull · Common heather

Johannes van Leuven

1 record

Curly Head

Terminated

Quercus cerris L. · European turkey oak

Maarten Bömer

1 record

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