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.

Purple Dynamite

Active

Fritillaria L. · Fritillary

A. Verschoor Bloembollen B.V.

1 record

Pulmapäev

Active

Clematis L. · Clematis

Uno Kivistik, Aili Kivistik

1 record

Profesor Wojtaszek

Active

Rhododendron L. · Azalea

Uniwersytet Rolniczy im. Hugona Kołłątaja w Krakowie

1 record

Précoce de fontenay

Terminated

Brassica oleracea L. (Brussels Sprouts Group) · Brussels sprouts

Domaine Public (FR)

1 record

Profusion

Terminated

Fragaria x ananassa Duchesne ex Rozier · Garden strawberry

Service Officiel de Controle (FR)

1 record

Prior

Active

Vitis vinifera L. · Common grape vine

Dr. Norbert Becker im Staatl. Weinbauinstitut

2 records

Price Fighter

Active

Tulipa L. · Tulip

Triflor Breeding Rights B.V.

1 record

Powder Puff

Active

Allium L. · Ornamental Allium

Mellema-Versteeg B.V.

1 record

Power Parrot

Active

Tulipa L. · Tulip

Fa. Gebroeders Ran

1 record

Purple Hype

Active

Lilium L. · Lily

G.A. Verdegaal en Zn. Export B.V.

2 records

Pointu perce-neige

Terminated

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

Domaine Public (FR)

1 record

Pom Pom Rose

Active

Narcissus L. · Daffodil

Brian S. Duncan

1 record

Plevenski favorit

Active

Vitis vinifera L. · Common grape vine

Miroslav Ivanov, Vasil Valchev, Zdravko Nakov

2 records

Pille

Active

Clematis L. · Clematis

Uno Kivistik, Aili Kivistik

1 record

Perła Czabańska ISK

Terminated

Vitis L. · Grapevine

Instytut Sadownictwa i Kwiaciarstwa im. Szczepana Pieniążka

1 record

Persei

Terminated

Prunus persica (L.) Batsch · Peach

Lobanovs`ka Valentyna Fedorivna, Fedorova Ol`ha Stepanivna, Latsko Tetiana Anatoliivna, Smykov Volodymyr Karpovych, Smykov Anatolii Volodymyrovych, Perfil`ieva Zoia Mykolaivna,

2 records

Pfitzeriana Aurea

Terminated

Juniperus x pfitzeriana (Späth) P. A. Schmidt · Pfitzer juniper

Vorobiova Olena Anatoliivna

1 record

Pinksize

Active

Tulipa L. · Tulip

C.Th. Ammerlaan en Zn. B.V.

1 record

Peach Melba

Active

Crocosmia x crocosmiiflora (Lemoine) N. E. Br. · autumn-gold

T.J.M. Leenen

1 record

Peach Dwarf

Terminated

Lilium L. · Lily

Mount Hood Lilies Inc.

1 record

Pinotin

Active

Vitis vinifera L. · Common grape vine

Valentin Blattner-Haefeli und Frau Silvia

2 records

Pink Horizon

Application submitted

Clematis L. · Clematis

Szczepan Marczyński

1 record

Pamplona

Active

Tulipa L. · Tulip

Fa. A. en L. Duin

1 record

Perdin

Active

Vitis L. · Grapevine

INSTITUT NATIONAL DE LA RECHERCHE AGRONOMIQUE, FR

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.