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.

Kerbelchamp

Active

Primula vulgaris Huds. · Primrose

Priscilla Grace Kerley, David William Kerley, Timothy Edward Kerley

2 records

Hachgold

Active

Rhododendron L. · Azalea

Holger Hachmann

2 records

Hachcher

Active

Rhododendron L. · Azalea

Holger Hachmann

2 records

Golden Sun

Active

Liquidambar styraciflua L. · American sweetgum

BETE SIERHEESTERS

2 records

JWW11

Active

Cercidiphyllum japonicum Siebold & Zucc. · katsura-tree

Wezelenburg, Jr. Jan-Willem

2 records

Hyfaria

Active

Sorbaria sorbifolia (L.) A. Braun

Jones John,Jones Maria

2 records

Gunsmoke

Terminated

x Heucherella H. R. Wehrh. · Foamy bells

Janet N. Egger

2 records

Hifir

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Roy Robin van Dijk

2 records

Gosia

Active

Cornus controversa Hemsl. · Giant dogwood

Wilhelmus J. van Ooi

2 records

JWW2

Active

Acer palmatum Thunb. · Japanese maple

Jan-Willem Wezelenburg Boskoop B.V.

2 records

JOZ276

Active

Panicum virgatum L. · Switchgrass

Josef Hendrik Vergeldt

2 records

GAUCHEBRA

Active

Oenothera lindheimeri (Engelm. & A. Gray) W. L. Wagner & Hoch · Lindheimer's beeblossom

MICHIO KATAOKA

2 records

Kerbelmilk

Active

Primula vulgaris Huds. · Primrose

Priscilla Grace Kerley, David William Kerley

2 records

JOSAVIB1

Active

Viburnum rhytidophyllum Hemsl. · leatherleaf viburnum

Josa Selecties B.V.

2 records

JOBIRD

Active

Lavatera L. · Tree mallow

Hyfryd Plants

2 records

GRHYAR1406

Active

Hydrangea arborescens L. · Smooth hydrangea

Guido Rouwette

2 records

Flipper Light

Terminated

Dianthus L. · Carnation

Flavio Sapia

2 records

HARJOLLY

Application submitted

Rosa L. · Rose

HARKNESS NEW ROSES LTD

2 records

Hardrock

Active

Lilium L. · Lily

Testcentrum voor Siergewassen B.V.

2 records

Inspiration

Active

Berberis thunbergii DC. · Japanese barberry

Michal Andrusiv

2 records

Frojas

Protection expired

Jasminum officinale L. · Common Jasmine

WEST DAVID

2 records

Hachzwerg

Active

Ilex aquifolium L. · Common holly

Holger Hachmann

2 records

Golden Alexander

Terminated

Lysimachia punctata L. · Dotted loosestrife

Tristram David R.

2 records

Florsaxapple

Active

Saxifraga x arendsii Engl. · Arends saxifrage

Florensis B.V.

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.