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.

Silla

Active

Lilium L. · Lily

World Breeding B.V

1 record

SCHINOASA

Withdrawn

Juglans regia L. · Persian walnut

TURCANU ION

1 record

Semu

Active

Clematis L. · Clematis

Uno Kivistik, Aili Kivistik

1 record

Seyval ISK

Terminated

Vitis L. · Grapevine

Instytut Sadownictwa i Kwiaciarstwa im. Szczepana Pieniążka

1 record

Satie

Active

Fritillaria L. · Fritillary

V.O.F. de Keizerskroon

1 record

Sanvor1

Active

Thuja occidentalis L. · Northern white-cedar

Sándor Vörös

1 record

Sardegna

Active

Trifolium incarnatum L. · Crimson clover

PADANA SEMENTI ELETTE S.R.L.

1 record

Sanguine Durieux

Application submitted

Prunus persica (L.) Batsch · Peach

GAEC des Pepinieres Gromolard (FR)

1 record

Scipione

Active

Lilium L. · Lily

Mak Breeding Rights B.V.

1 record

SACHSENSTERN

Terminated

Rhododendron L. · Azalea

RANNACKER KARSTEN

1 record

Rubina

Protection expired

Aronia Medik. · Chokeberry

Dr. Aladar Porpaczy - Forschungsinstitut für Beerenobst

1 record

Rüütel

Active

Clematis L. · Clematis

Uno Kivistik, Aili Kivistik

1 record

Royal Ten

Active

Tulipa L. · Tulip

Tulip Flower B.V.

1 record

Rum'ianyi Nikits`kyi

Terminated

Prunus persica (L.) Batsch · Peach

Smykov Volodymyr Karpovych, Oriekhova Valentyna Petrivna, Perfil`ieva Zoia Mykolaivna, Smykov Anatolii Volodymyrovych,

2 records

Rumeks OK-2

Terminated

Rumex tianschanicus A. Los

Rakhmetov Dzhamal Bakhlul ohly, Uteush IUrii Adol`fovych,

1 record

Sadove chudo

Terminated

Rubus L. subg. Rubus · Blackberry

Silenko Volodymyr Oleksandrovych, Hav'iuk Petro Mykhailovych, Sherenhovyi Vitalii Petrovych, Sherenhovyi Petro Zakharovych,

2 records

Rubin tairovs`kyi

Active

Vitis vinifera L. · Common grape vine

Ovchynnikov Hryhorii Petrovych, Tarakhtii Liudmyla Ivanivna, Abliazova Aia Pavlivna, Tulaieva Maia Ivanivna, Dokuchaieva IEvheniia Mykolaivna,

1 record

ROYAL GLORY ZAIFER

Terminated

Prunus persica (L.) Batsch · Peach

F.ZAIGER

1 record

Romulus

Withdrawn

Vitis L. · Grapevine

R.Gilg et Succ. SA (FR)

1 record

Rotes Phaenomen

Terminated

Rosa L. · Rose

BAUM KARL| Karl Baum

1 record

ROTES MEER N0 5

Terminated

Rosa L. · Rose

Karl BAUM (DE)

1 record

Romina

Terminated

Calluna vulgaris (L.) Hull · Common heather

Kurt Kramer (Heidezüchtung)

1 record

Rypariia x Rupestrys 4923

Active

Vitis vinifera L. · Common grape vine

Maliukina Nina Anatoliivna, Mazurenko Liudmyla Stepanivna, Kovalova Iryna Anatoliivna, Chysnikov Vitalii Stepanovych, Tulaieva Maiia Ivanivna,

4 records

Rima

Terminated

Actinidia Lindl. · Actinidia

Skrypchenko Nadiia Vasylivna, Shaitan Ivan Myronovych, Kleieva Rima Fedorivna,

1 record

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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.