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.

Pretty Pistachio

Active

Heuchera L. · Coral Flower

Hansen Hans A

3 records

Rhodunter 149

Active

Rhododendron L. · Azalea

Preil Walter|Ammersbek, DE

3 records

Red Globe

Active

Vitis L. · Grapevine

4 records

Short and Sassy

Active

Helenium autumnale L. · Common sneezeweed

GINA M. FALCETTI-ARNOLD

3 records

Purple Rain

Active

Astilbe chinensis (Maxim.) Franch. & Sav. · Chinese astilbe

van de Meer Hans|Roelofarendsveen, NL

3 records

PTSLCN

Application submitted

Pittosporum tenuifolium Gaertn. · Kohuhu

Leo Koelewyn, Coolwyn Nurseries Pty Ltd

3 records

Prima Donna

Active

Phlomis tuberosa L.

Petrus Hendricus Oudolf

3 records

Pretty in Blue

Active

Clematis L. · Clematis

Win Snoeijer

3 records

Rose Marvel

Active

Salvia x sylvestris L. · Wood sage

Kievit Christa

4 records

Rencri

Active

Hydrangea paniculata Siebold · Panicled hydrangea

Renault Jean

3 records

PODCEPT1

Withdrawn

Buddleja L. · Buddleia

Podaras Peter

3 records

Rock and Roll

Active

Astilbe Buch.-Ham. ex D. Don · False goat's beard

Verduin Harry G. J.|Heemskerk, NL

3 records

Red Lark

Active

Delphinium L. · Larkspur

Legro Robert A. H. / Kievit Christa / Eisenreich Robert B.

3 records

Rengun

Active

Eucalyptus gunnii Hook. f. · Cider Gum

Renault Jean

4 records

Pink Sorbet

Active

Echinacea purpurea (L.) Moench · Purple coneflower

Blom Arie|3452 AR Vleuten, NL

3 records

Purrsian Blue

Active

Nepeta x faassenii Bergmans ex Stearn · Faassen's catnip

Walters Gardens Inc

3 records

Red Lightning

Active

Heuchera L. · Coral Flower

Janet N. Egger

3 records

Pretty Lady Emily

Active

Anemone hupehensis Lemoine · Japanese anemone

Yoshihiro Kanazawa

4 records

Pretty Lady Julia

Active

Anemone hupehensis Lemoine · Japanese anemone

Yoshihiro Kanazawa

3 records

Real Charmer

Active

Leucanthemum x superbum (Bergmans ex J. W. Ingram) D. H. Kent · Shasta daisy

Lintott Keith George / Read Charles Richard

4 records

PKMp01

Active

Campanula portenschlagiana Schult. · Dalmatian bellflower

Jensen Gert Kim|Odense, DK / Andersen Per Elmegaard|Skalskor, DK

3 records

Pink Pearl

Active

Papaver orientale L. · Oriental poppy

Oudshoorn Hubertus Gerardus

3 records

Poulpal022

Terminated

Rosa L. · Rose

Poulsen Roser AS, DK - 3480 Fredensborg

3 records

Prairie Twilight

Active

Penstemon Schmidel. · Beard Tongue

Lindgren Dale T.|North Platte, NE, US / Schaaf Daniel M.|North Platte, NE, US

3 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.