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.

Colour Fusion

Active

Tulipa L. · Tulip

Q.J. Vink & Zn. B.V.

1 record

Coalition

Active

Tulipa L. · Tulip

Bloembollen Kwekerij Jan de Wit en Zonen B.V.

1 record

Columna

Terminated

Thuja occidentalis L. · Northern white-cedar

Bunyn Maksym Viktorovych

1 record

C.S.S. 02

Active

Olea europaea L. · Olive

Sonnoli Attilio

1 record

Crystal Star

Active

Tulipa L. · Tulip

Dijk & Zoon

1 record

Championship

Active

Tulipa L. · Tulip

Future Rights B.V

1 record

Centennial

Active

Tulipa L. · Tulip

Huijg Veredeling B.V.

1 record

Chenin

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

1 record

Cooler

Terminated

Zea mays L. subsp. mays (Maize Group) · Maize

Syngenta Crop Protection AG

1 record

Chmurka

Terminated

Syringa vulgaris L. · Common lilac

Kujawsko - Pomorskie Przedsiebiorstwo Hodowli Roslin Ogrodniczych

1 record

Cherry Baby

Active

Lilium L. · Lily

GeGe Beheer B.V.

1 record

Copernicus

Active

Clematis L. · Clematis

Szczepan Marczyński

1 record

Casablanca

Active

Muscari · Grape hyacinth

Smakman Bloembollen Breezand B.V.

1 record

Cacaks Early

Active

Prunus domestica L. · European plum

Information not available - Contact NL authorities

1 record

Christin

Withdrawn

Calluna vulgaris (L.) Hull · Common heather

KUEPPERS MATTHIAS| Matthias Kueppers

1 record

Celebi

Active

Triticum aestivum L. · Bread wheat

Lemaire Deffontaines (FR)

1 record

Callahan

Active

Tulipa L. · Tulip

Westend Bulb B.V.

1 record

Botsadivs`kyi

Terminated

Prunus armeniaca L. · Apricot

Kudrenko Iryna Kostiantynivna, Chupryna Lesia Mykhailivna, Shaitan Ivan Myronovych,

1 record

Caddy

Active

Lilium L. · Lily

Laan Flora Facilities B.V.

1 record

Cacanska Rodna ISK

Terminated

Prunus domestica L. · European plum

Instytut Sadownictwa i Kwiaciarstwa im. Szczepana Pieniążka

1 record

Briz

Application submitted

Vitis vinifera L. · Common grape vine

Dimitar Babrikov, Venelin Roychev, Agricultural University - Plovdiv (BG)

1 record

Brigitta Blue WIL

Terminated

Vaccinium corymbosum L. · Highbush blueberry

Gospodarstwo Ogrodnicze Jerzy Wilczewski

1 record

Cara Cara Navel

Active

Citrus sinensis (L.) Osbeck · Sweet orange

INCONNU (FR)

1 record

Canadice ISK

Terminated

Vitis L. · Grapevine

Instytut Sadownictwa i Kwiaciarstwa im. Szczepana Pieniążka

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.