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.

Barbara Harrington

Active

Clematis L. · Clematis

Harrington Dominic|Wisbech, GB PE14 7AJ

3 records

Boysenberry

Active

Heuchera L. · Coral Flower

van den Haak Jelle

3 records

Binoche

Active

Heuchera L. · Coral Flower

Scheys Diederik A. M.

3 records

Altarus

Active

Lilium L. · Lily

Testcentrum voor Siergewassen B.V.

3 records

APPOFAMWE

Active

Phlox paniculata L. · Garden phlox

van den Haak Jelle

3 records

Fringante

Terminated

Avena sativa L. · Oat

INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR

FR HR

3 records

Spinel

Active

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

Hazera Seeds B.V.

3 records

GTE Yaspis

Terminated

Hordeum vulgare L. · Barley

G. Mihova, S. Tsvetkov, I. Iliev, T. Petkova, V. Ivanova, S. Doneva, I. Ivanova, D. Yordanova, A. Ivanova

4 records

GK Csillag

Active

Triticum aestivum L. · Bread wheat

Matuz Janos / Kertesz Zoltanne / Kertesz Zoltan / Banhidy Judit / Csoesz Laszlone / Beke Bela / Cseuz Laszlo / Mesterhazy Akos / Acs Peterne / Falusi Janos / Petroczi Istvan / Papp Maria

4 records

Vitakola

Terminated

Actinidia Lindl. · Actinidia

Jan Kola Daniela Kolova

CZ PL

2 records

TAN98383

Terminated

Rosa L. · Rose

Rosen-Tantau Mathias Tantau Nachfolger

DE PL

2 records

Rusalka 3

Active

Vitis vinifera L. · Common grape vine

MINCHO GUENCHEV KONDAREV

BG ES

3 records

Rhea

Active

Vitis vinifera L. · Common grape vine

Dorothea Pospislova c/o VSSVVM n.o.

DE SK

3 records

Perdin

Active

Vitis vinifera L. · Common grape vine

PUOGET ROGER

DE IT

2 records

Poulbay

Terminated

Rosa L. · Rose

POULSEN ROSER A/S

DE DK

2 records

Porilux

Active

Allium porrum L. · Leek

Hazera Seeds B.V.

NL UA

2 records

Pinocchio

Terminated

Dianthus caryophyllus L. · Carnation

G.NOBBIO

ES NL

2 records

Onice

Active

Hordeum vulgare L. · Barley

UNIVERSIDAD DE BOLOGNA

ES IT

2 records

MY-BO-1

Protection expired

Prunus cerasifera Ehrh. · Cherry plum

CZ SK

2 records

Lired

Protection expired

Malus domestica (Suckow) Borkh. · Apple

Instytut Sadownictwa i Kwiaciarstwa im. Szczepana Pieniążka

FR PL

2 records

Krolowa Majowych TOR

Active

Lactuca sativa L. var. capitata L. · Head lettuce

TORSEED - Przedsiebiorstwo Nasiennictwa Ogrodniczego i Szkolkarstwa S.A.

PL UA

5 records

KORGATUM

Terminated

Rosa L. · Rose

W. Kordes Sohne Rosenschulen GmbH & Co KG| DE

ES FR

2 records

Kormorlet

Protection expired

Rosa L. · Rose

Werner Kordes / Reimer Kordes / Wilhelm Kordes

DE FR

2 records

Dunav

Active

Vitis vinifera L. · Common grape vine

Mincho Kondarev, Nedyalka Matevska

BG ES

2 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.