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.

Meidiaphaz

Active

Rosa L. · Rose

ALAIN ANTOINE MEILLAND (FR)

4 records

Longton

Active

Allium porrum L. · Leek

NUNHEMS

7 records

Liseta

Active

Triticum aestivum L. · Bread wheat

SELGEN A.S

5 records

Little Princess

Active

Sidalcea A. Gray · False Mallow

Geerlings Aad

4 records

LAETITIA

Active

Fragaria L. · Strawberry

LEIS, Michelangelo, IT / MARTINELLI, Alessio, IT / CASTAGNOLI, Gianfranco, IT

5 records

Lazarka

Active

Triticum aestivum L. · Bread wheat

Nikolay Tsenov, Ivanka Stoeva, Ivan Panayotov, Ivan Todorov, Kostadin Kostov, Tatyana Petrova, Iliya Iliev, Vanya Kiryakova

5 records

Korpatetof

Active

Rosa L. · Rose

Wilhelm Kordes,Tim-Hermann Kordes,Margarita Kordes

4 records

Lace Lady

Active

Robinia L. · Locust

P.J. Cunningham

4 records

Korterschi

Active

Rosa L. · Rose

Wilhelm Kordes,Tim-Hermann Kordes,Margarita Kordes

4 records

Farolito

Active

Lilium L. · Lily

PEACOK B.V.& IMANSE LELIEVEREDEL ING B.V.

4 records

Excalibur

Active

Prunus domestica L. · European plum

R P JONES

5 records

Curly Red

Active

Leucothoe axillaris (Lam.) D. Don · Dog hobble

Van Opstal Ron|4882 NM Zundert, NL

4 records

Delamo

Active

Rosa L. · Rose

Société Nouvelle Pépinières et Roseraies Georges Delbard S.A.S.

4 records

C 35

Active

Citrus x insitorum Mabb.

5 records

Brilla

Active

Fragaria x ananassa Duchesne ex Rozier · Garden strawberry

Walther Faedi^^^Gianluca Baruzzi^^^Pierluigi Lucchi^^^Paolo Sbrighi

5 records

Baikal

Active

Brassica oleracea L. (Savoy Cabbage Group) · Savoy cabbage

Syngenta Seeds, NL

5 records

Bacardi

Active

Lilium L. · Lily

Mak Breeding Rights B.V.

4 records

Annaglo

Active

Malus domestica (Suckow) Borkh. · Apple

The Wislang Family Trust (NZ)

6 records

Alicante Bouschet

Active

Vitis vinifera L. · Common grape vine

INCONNU (FR)

5 records

Zoqum

Active

Clematis L. · Clematis

WILLEM STRAVER

4 records

Zoprika

Active

Clematis L. · Clematis

van Zoest Jan

4 records

WP Passion

Active

Dianthus x allwoodii hort. · Allwood pink

Whetman Pinks

4 records

Wilcott

Active

Euphorbia characias L. · Mediterranean spurge

WILLIS DAVID

4 records

White Crown

Active

Protea cynaroides L. · King Protea

Peter Sijpkes, Ausflora Pacific Pty Ltd

4 records

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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.