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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.

MACGEU001

Active

Geum L. · Avens

MacGregor Alasdair,MacGregor Elizabeth

3 records

Kortinofli

Active

Rosa L. · Rose

Wilhelm Kordes,Tim-Hermann Kordes,Margarita Kordes

3 records

KORfocgri

Active

Rosa L. · Rose

Wilhelm Kordes,Tim-Hermann Kordes,Margarita Kordes

3 records

Kui Nuku

Active

Hibiscus coccineus x Hibiscus moscheutos L.

Zwetzig Gretchen

4 records

Jwncopps

Active

Coprosma repens A. Rich. · Mirror bush

Lord John|Woodbridge, GB

4 records

KORpot001

Active

Rosa L. · Rose

wilhelm kordes margarita kordes tim-hermann kordes

3 records

HYLV17520

Active

Hydrangea paniculata Siebold · Panicled hydrangea

Lendert De Vos

3 records

KLEDP25525

Application submitted

Dianthus caryophyllus L. · Carnation

MAIKE BOXRIKER

3 records

Korzweenu

Active

Rosa L. · Rose

Wilhelm Kordes,Tim-Hermann Kordes,Margarita Kordes

3 records

Holkahoripink

Active

Dianthus superbus L. · Large pink

SHISHIDO KAZUYUKI

3 records

HortBlue Petite

Active

Vaccinium corymbosum L. · Highbush blueberry

Narandra Patel^^^SYDNEY SOLOMONA

4 records

Kerbeewhite

Active

Lavandula angustifolia Mill. · English lavender

Kerley Timothy Edward / Kerley Sarah Elisabeth / Kerley David William / Kerley Priscilla Grace

3 records

Hinebud1

Active

Buddleja L. · Buddleia

Podaras Peter C.

4 records

Golden Rocket

Active

Berberis thunbergii DC. · Japanese barberry

Michal Andrusiv

3 records

Kiowa

Active

Rubus L. subg. Rubus · Blackberry

The Board Of Trustees Of The University Of Arkansas

4 records

HB07

Active

Picea glauca (Moench) Voss · White spruce

Boomkwekerij Huijbers B.V.

3 records

Golden Jack

Active

Spiraea japonica L. f. · Japanese meadowsweet

Wilkoński Karol

3 records

Golden Brabant

Active

Thuja occidentalis L. · Northern white-cedar

van Vliet Sander

3 records

Gold Chang

Active

Ajuga reptans L. · Bugle

Mimoto Kazuo

3 records

Gojiberry

Active

Heuchera L. · Coral Flower

van den Haak Jelle

3 records

Frosted Flame

Active

Euphorbia amygdaloides L. · Wood spurge

Paul Stead

3 records

Frostbite

Active

Brunnera macrophylla (Adams) I. M. Johnst. · Siberian bugloss

Sloane M. Scheiber

3 records

Gelesq

Active

Physocarpus opulifolius (L.) Maxim. · Ninebark

Schuurbiers Marinus Martinus Hendrikus|NL-7211 Eefde, NL

3 records

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