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.

Rafzuera

Active

Ribes uva-crispa L. · Gooseberry

Peter Hauenstein

7 records

Redlam

Active

Prunus avium (L.) L. · Sweet cherry

Laurence Mailard Arsene Mailard

7 records

Poulstri

Application submitted

Rosa L. · Rose

Poulsen Roser A/s

5 records

Pinot Iskra

Active

Vitis vinifera L. · Common grape vine

Morgante Michele

5 records

New Horizon

Active

Ulmus L. · Elm

SMALLEY| Prof. E.B. Smalley c/o University of Wisconsin/Madison

6 records

Meichibon

Active

Rosa L. · Rose

Meilland Alain A.

5 records

Marco Polo

Active

Lilium L. · Lily

Vletter, Floris|Rijnsburg, Netherlands

5 records

Icicle

Active

Pisum sativum L. · Pea

ProGene Plant Research LLC

6 records

Haymaker Plus

Active

Vicia villosa Roth · Hairy vetch

SEEDCO

6 records

Eldoret

Active

Lilium L. · Lily

Mak Breeding Rights B.V.

6 records

Balfieplos

Active

Impatiens walleriana Hook. f. · Busy Lizzie

Uchneat Michael S.

5 records

Tesmaya

Active

Alstroemeria L. · Alstroemeria

Tas Marius

6 records

Tanogrew

Active

Rosa L. · Rose

Rosen Tantau KG

5 records

Summer Melody

Terminated

Argyranthemum frutescens (L.) Sch. Bip. · Marguerite daisy

University of Sydney

6 records

Spring Lady

Active

Prunus persica (L.) Batsch · Peach

6 records

Spefire

Active

Rosa L. · Rose

Spek Rose Breeding International B.V.

5 records

Sprilecstar

Active

Cordyline banksii Hook. f. · Cordyline

Zhejiang Academy of Agriculture Sciences

5 records

SMCOSS

Active

Cephalanthus occidentalis L. · button-willow

Wood Timothy D

5 records

Poulpar030

Active

Rosa L. · Rose

Poulsen Roser AS, DK - 3480 Fredensborg

5 records

Pink Skyrocket

Active

Tiarella L. · Foamflower

TERRA NOVA NURSERIES INC

5 records

Poulaksel

Application submitted

Rosa L. · Rose

Poulsen Roser A/s

6 records

Microhirs3

Active

Rhododendron L. · Azalea

WALTER PREIL|RALF LUTTMANN

6 records

MDB001

Active

Agapanthus L'Hér. · Lily of the Nile

Quinton Bean

5 records

Lemon and Lime

Active

Coprosma J.R. et G. Forst. · Mirror bush

Steenland Ron|Boskoop, NL

6 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.