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.

Virtuoso

Withdrawn

Lilium L. · Lily

G.A. Verdegaal en Zn. Export B.V.

1 record

Wiblek

Terminated

Prunus cerasus L. · Sour cherry

Instytut Sadownictwa i Kwiaciarstwa im. Szczepana Pieniążka

2 records

Viktoria

Active

Erica gracilis J. C. Wendl. · Slender heath

Hans-Peter Holz

1 record

Vaya Con Dios

Active

Tulipa L. · Tulip

Vertuco B.V.

1 record

Wave

Withdrawn

Narcissus L. · Daffodil

Leenen en Zoon

1 record

Vampire

Active

Tulipa L. · Tulip

Holland Bolroy Markt B.V.

1 record

Vechirnia Symfoniia

Terminated

Chrysanthemum L. · Chrysanthemum

Zavidova Liudmyla Hnativna, Horobets Vasyl Fedorovych,

2 records

Valge Daam

Active

Clematis L. · Clematis

Uno Kivistik, Aili Kivistik

1 record

UTP Salmon Gardy

Active

Chrysanthemum x morifolium Ramat. · Florist's daisy

Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich

1 record

Undulata var undulata

Terminated

Hosta Tratt. · Hosta

Alieksieienko Oksana Volodymyrivna, Vol`s`ka IUliana Oleksandrivna,

1 record

Verte à coeur plein

Terminated

Valerianella locusta (L.) Laterr. · Corn salad

Service Officiel de Controle (FR)

1 record

Veneda

Terminated

Rosa L. · Rose

Uniwersytet Przyrodniczy w Poznaniu

2 records

Triticor

Terminated

x Triticosecale Wittm. ex A. Camus · Triticale

CIBA GEIGY SA (FR)

1 record

Tsurugi no mai

Active

Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven

Information regarding the breeder received in the contribution to CPVO :Yamasaki & Fujii

1 record

Vasylysa prekrasna

Terminated

Prunus avium (L.) L. · Sweet cherry

Yarushnykov Volodymyr Volodymyrovych, Taranenko Liliia Ivanivna,

2 records

Valentyn 90

Terminated

x Triticosecale Wittm. ex A. Camus · Triticale

Filobok Vira Oleksiivna, Fomenko Nina Panteliivna, Bukreieva Halyna Ivanivna, Khudokormova Zhanna Mykolaivna, Filobok leontii Petrovych, Kudriashov Ihor Mykolaiovych, Bespalova Liudmyla Andriivna, Dudka Liubov Fedorivna, Kovtunenko Viktor IAkovych, Tymof

1 record

Toronto

Active

Iris L. · Iris

World Flower B.V.

1 record

Triton ISK

Terminated

Ribes nigrum L. · Blackcurrant

Instytut Sadownictwa i Kwiaciarstwa im. Szczepana Pieniążka

1 record

Toendra

Active

Tulipa L. · Tulip

G. Buis Bloembollen B.V.

1 record

Tiny Halo

Active

Lilium L. · Lily

Mak Breeding Rights B.V./Arroyo Rights B.V.

1 record

Tiny Crystal

Active

Lilium L. · Lily

Mak Breeding Rights B.V.

1 record

Tulameen ISK

Withdrawn

Rubus idaeus L. · Red raspberry

Instytut Sadownictwa i Kwiaciarstwa im. Szczepana Pieniążka

2 records

Tiny Comfort

Active

Lilium L. · Lily

Mak Breeding Rights B.V.

2 records

Tiny Dancer

Active

Lilium L. · Lily

Mak 't Zand B.V.

1 record

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Variety traits

Maturity group 89 063
Yield 67 000
Vigor 53 548
Plant height 51 504
Lodging 50 198
Taste and aroma 36 010
Variety origin 29 523
Productivity 27 845

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Text source

This summary is compiled from the publications listed in the sources and verified by an editor. It contains no legally significant information; it provides agronomic context for registry data rather than the registry data itself.