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.

POULmanti

Active

Rosa L. · Rose

Poulsen Roser A/S

7 records

Mini Blues

Active

Vaccinium corymbosum L. · Highbush blueberry

United States Department of Agriculture-ARS HCRL

8 records

Gold Nugget

Active

Citrus reticulata Blanco · Mandarin orange

The Regents of the University of California

7 records

Evijohill

Active

Clematis L. · Clematis

RAYMOND J. EVISON|Josephine Hill

7 records

Poulpah024

Active

Rosa L. · Rose

Poulsen Roser AS, DK - 3480 Fredensborg

7 records

Montezuma

Active

Lilium L. · Lily

Vletter en den Haan Beheer B.V.

8 records

Korpauvio

Active

Rosa L. · Rose

Wilhelm Kordes,Tim-Hermann Kordes,Margarita Kordes

7 records

Lesdasma

Active

Thuja occidentalis L. · Northern white-cedar

Lescow Jan

7 records

Eclipse

Active

Rubus L. subg. Rubus · Blackberry

United States Department of Agriculture-ARS HCRL

7 records

Navarra

Terminated

Lilium L. · Lily

WIM VLETTER

BE DE FR NL PL

6 records

Navona

Protection expired

Lilium L. · Lily

Vletter & Den Haan Beheer B.V

BE DE FR NL PL

6 records

Korpinrob

Protection expired

Rosa L. · Rose

W. Kordes Sohne Rosenschulen GmbH & Co KG| DE

DE DK FR NL SE

6 records

Mary Washington

Active

Asparagus officinalis L. · Asparagus

Semenarna Ljubljana, SI

ES HR IT SI

6 records

Magnum

Active

Beta vulgaris Fodder Beet Group · Mangelwurzel

MariboHilleshög ApS

DE DK FR LT

7 records

Poulgode

Terminated

Rosa L. · Rose

Poulsen Roser A/S

DK NL PL

7 records

kaigaro

Active

Allium fistulosum L. · Welsh onion

Jock Rudi

DE NL UA

6 records

Arsenal

Active

Triticum aestivum L. · Bread wheat

Sud Cereales (FR)

BE FR IT

9 records

Amerigo

Active

Phacelia tanacetifolia Benth. · Lacy phacelia

P.H. Petersen Saatzucht Lundsgaard GmbH Herrn Asmus Sören Petersen / Dr. Werner Horn in Fa. Syngenta Hadmersleben GmbH

DE HU IT

10 records

Accent

Active

Valerianella locusta (L.) Laterr. · Corn salad

Jan Draaistra

HR NL UA

7 records

Sandidge

Active

Malus domestica (Suckow) Borkh. · Apple

SANDIDGE JR. - CHARLES R.

FR NL

11 records

Mara des bois

Active

Fragaria L. · Strawberry

MR. ANDRE MARIONNET

BE IT

6 records

Makako

Active

Prunus dulcis (Mill.) D. A. Webb · Almond

Teresa Cremades Rosado^^^Manuel Rubio Angulo^^^Raquel Sánchez Pérez^^^Pedro José Martínez Garcia^^^Federico Dicenta López-Higuera^^^José Egea Caballero^^^Pedro Martínez Gómez^^^Encarnación Ortega Pastor

ES UA

11 records

Meinabron

Active

Rosa L. · Rose

Meilland, Marie-Louise|deceased, late of Antibes, France, by Jean-Pierre Le Naour, legal representative

FR IT

6 records

Ice Princess

Active

Prunus persica (L.) Batsch · Peach

Norman Glen Bradford (US)/Lowell Glen Bradford (US)

FR IT

7 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.