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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.

COUHAPRIM

Active

Hydrangea paniculata Siebold · Panicled hydrangea

Jacques Couturieux

1 record

BOZREKA023

Terminated

Rosa L. · Rose

Pheno Geno Roses B.V.

1 record

Coco

Active

Calluna vulgaris (L.) Hull · Common heather

Horst Marohn

1 record

Blue Belle

Active

Dierama K. Koch · wandflower

Diane L. Rowe

1 record

ARTBUD 1583

Active

Buddleja davidii Franch. · Butterfly bush

Norbert Artmeyer

1 record

Challenger

Terminated

Veronica L. · Speedwell

Edens Creations B.V.

1 record

Aya

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Takanori Kawaguchi

1 record

Clarmo

Withdrawn

Lavandula L. · Lavender

CLARKE T. E.

1 record

Aspire

Terminated

Veronica L. · Speedwell

HARINI KORLIPARA

1 record

Batlad

Terminated

Lavandula L. · Lavender

PRIEST STUART

1 record

Anna Irena

Active

Robinia L. · Locust

Stefan Wlodarczyk

1 record

Breathless

Active

Geranium L. · Crane's Bill

Karin Kosick

1 record

Bozedib021

Active

Rosa L. · Rose

Pheno Geno Rose D.O.O.

1 record

Black Pearl

Active

Loropetalum chinense (R. Br.) Oliv. · Chinese fringe flower

ZHEJIANG SENHE SEED CO. LTD

1 record

Aino

Active

Vaccinium L. · Bilberry

Maatalouden tutkimuskeskus (MTTK) (later: Maa- ja elintarviketaouden tutkimuskeskus (MTT)/ Present Luonnonvarakeskus (Luke))

1 record

AUSPARADE

Active

Rosa L. · Rose

David Austin Roses

1 record

Big Top Bronze

Withdrawn

Heuchera L. · Coral Flower

Witteman & Co. Multiflora B.V.

1 record

Blue Eyes

Active

Scabiosa columbaria L. x Scabiosa japonica Miq.

Seoha Plant Breeding Institute

1 record

'1334 Demeter'

Application submitted

Vaccinium corymbosum L. · Highbush blueberry

Gospodarstwo Szkółkarskie Anna Ciepłucha-Kowalska

1 record

Ascot Moonbeam

Withdrawn

Euphorbia characias L. · Mediterranean spurge

David Glenn

1 record

Baracuda

Withdrawn

Tulipa L. · Tulip

J. en P. Snoek en Zn. B.V.

1 record

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