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Variety traits

Winter Hardiness — Hydrangea macrophylla

Hydrangea macrophylla (Thunb.) Ser.

For Hydrangea macrophylla, winter hardiness is determined by the ability of flower buds formed on the previous year's shoots to withstand low temperatures without damage. The primary criterion for assessment is the preservation of shoots and the flowering potential in the following season.

In the reference 187 varieties crop Bigleaf hydrangea, where this is mentioned in the description.

For Hydrangea macrophylla, the critical parameter is the temperature threshold for damage to generative buds. In traditional varieties, these can be damaged at temperatures around –5 °C, whereas modern series are capable of withstanding up to –23…–29 °C. Winter hardiness assessment includes an analysis of the percentage of overwintered shoots, bud break dynamics, and biochemical markers of adaptation, such as the level of catalase enzymatic activity and cell sap acidity.

Winter hardiness directly determines the cultivation technology and flowering pattern of the crop. In ordinary varieties, freezing of the aerial part leads to a complete absence of flowering, which necessitates mandatory protection or transition to container cultivation. In remontant varieties capable of forming buds on current-year shoots, high winter hardiness primarily influences the timing and abundance of flowering, allowing the plant to recover even in the event of partial loss of the previous year's shoots.

General information about the subject — on the page Winter hardiness.

Sources8

Varieties of Bigleaf hydrangea mentioned in the description

Selection based on the description text, not on official evaluation: these data are absent from registers. For specific variety details, please refer to its profile.

BTI

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Ryoji Irie

2 records

Goldrush

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

JOHN HEDGER

FR
2 records

Horgew

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Jungpflanzen Claus & Torsten Kühne GbR

2 records

Pirates Gold

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

MATTHEW MILLER

FR
2 records

Venice Raven

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Rampp, Franz-Xaver|Pfaffenhausen, Federal Republic of Germany / Rampp, Konrad|Salgen-Hausne, Federal Republic of Germany

FR
2 records

Vienna Rawi

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Rampp, Franz-Xaver|Pfaffenhausen, Federal Republic of Germany / Rampp, Konrad|Salgen-Hausne, Federal Republic of Germany

FR
2 records

Koria

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Cornelis Pieter Eveleens

4 records

H215906

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Hydrangea Breeders Association B.V.

2 records

Messalina

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Information regarding the breeder received in the contribution to CPVO :Kientzler

DK FR
3 records

Rapa

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Information regarding the breeder received in the contribution to CPVO :Rampp

FR
2 records

First White

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Information regarding the breeder received in the contribution to CPVO :HBA B.V.

FR
2 records

SCHROLLA03

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Schroll Management ApS

2 records

SCHROLLA06

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Schroll Management ApS

2 records

SCHROLLA07

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Schroll Management ApS

2 records

Magical Amethyst

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Kolster Beheer B.V.

FR
2 records

Paris

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Information regarding the breeder received in the contribution to CPVO :Rampp

FR
3 records

Kolmapiru

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Kolster Holding B.V.

2 records

Berlin Rabe

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Rampp, Franz-Xaver|Pfaffenhausen, Federal Republic of Germany / Rampp, Konrad|Salgen-Hausne, Federal Republic of Germany

FR
2 records

Ningbo

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Cornelis Pieter Eveleens

2 records

Julisa

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Jean-Paul Davasse

2 records

Love You Kiss

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

MOTOTERU YATABE ENGEI CORP.

2 records

Wedding Gown

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Toyokazu Ichie

2 records

HorAbstra

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

Meinl Katrin|Dresden, DE

FR
2 records

Ruby Tuesday

Active

Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea

De Jong Plant B.V.

3 records

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