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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.

Deppe

Active

Hypericum kalmianum L. · Kalm's St. John's-wort

Wood Timothy D

4 records

Delilah

Active

Phlox paniculata L. · Garden phlox

Oudshoorn Hubertus Gerardus

4 records

Eremo

Active

Lilium L. · Lily

Vletter & Den Haan Beheer B.V

4 records

DEVON PP 11

Active

Dianthus L. · Carnation

Whetman John|Chudleigh, Devon, TQ13 0NH, GB

4 records

Fascination

Active

Clematis L. · Clematis

Win Snoeijer

4 records

Emerald Mist

Active

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

Walters Gardens Inc

4 records

Coconut Lime

Active

Echinacea purpurea (L.) Moench · Purple coneflower

Blom Arie

4 records

DVPazurri

Active

Hibiscus syriacus L. · Rose of Sharon

Van Huylenbroeck Johan|Melle, BE

4 records

Charam

Application submitted

Euphorbia L. · Spurge

TICKNER BERNARD

4 records

Capri

Active

Astrantia major L. · Masterwort

Green Elite Collection B.V.

4 records

Cherry Tart

Active

Sedum L. · Ice Plant

Hansen Christopher M.

4 records

Devon Flavia

Active

Dianthus L. · Carnation

Whetman Plants International Limited

4 records

Blondie

Active

Phormium cookianum Le Jol. · mountain-flax

Robert Handyside

4 records

Arratwentyseven

Active

Vitis vinifera L. · Common grape vine

SHACHAR KARNIEL|SAL GIUMARRA

5 records

Citrine

Active

Coreopsis L. · Tickseed

Korlipara Harini

5 records

Archnah

Active

Arctotis L. · African daisy

Graham N. Brown

4 records

Apple Crisp

Active

Heuchera L. · Coral Flower

Janet N. Egger

5 records

Bee Happy

Active

Lavandula stoechas L. · French lavender

Robert J Cherry

4 records

Arbatax

Active

Lilium L. · Lily

Vletter & Den Haan Beheer B.V

4 records

Bailpanthree

Active

Hydrangea paniculata Siebold · Panicled hydrangea

Schulze Justin,McBee Oren,Roberts David Jonathan

4 records

Aushedge

Active

Rosa L. · Rose

David J.C.Austin

5 records

Ausfence

Active

Rosa L. · Rose

DAVID JC AUSTIN

5 records

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