Variety traits
Hydrangea macrophylla (Thunb.) Ser.
The ability of a plant to survive and preserve generative buds at sub-zero temperatures, which is critical for flowering in temperate climates.
In the reference 162 varieties crop Bigleaf hydrangea, where this is mentioned in the description.
For Hydrangea macrophylla, frost resistance is a key indicator, with original forms withstanding temperature drops down to –18°C. Modern breeding forms demonstrate increased resistance in the range of –20°C to –25°C, with some specimens capable of withstanding up to –30°C for shoot wood.
The main feature of the assessment is the survival of generative buds, which are significantly more sensitive to frost than the shoots themselves. Bud death leads to a lack of flowering; therefore, spring recurring frosts after the start of sap flow and temperature fluctuations that provoke premature vegetation pose a particular danger.
Cultivation technology involves focusing on remontant varieties capable of flowering on both last year's and current year's shoots. This allows the plant to maintain its ornamental value even in the event of partial freezing of the above-ground part during severe winters.
General information about the subject — on the page Frost hardiness.
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.
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Peter Rudolf Kolster
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Ryoji Irie
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Peter Rudolf Kolster
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Ryojie Irie
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
van Rosmalen Nick
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Ryoji Irie
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
WJG & JG, Hofstede
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Information regarding the breeder received in the contribution to CPVO :Rampp
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Ryoji Irie
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Ryoji Irie
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Wood Timothy D
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Kwekerij Sidaco B.V.
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Shiobara Shigeo
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Information regarding the breeder received in the contribution to CPVO :HBA B.V.
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Yu Li Qian^^^Tao Hao^^^Li Xiao Li^^^Huo Xiu Li^^^Yang Yu Yong
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Information regarding the breeder received in the contribution to CPVO :Glen Black
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Challet Herault S.A.S.
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Information regarding the breeder received in the contribution to CPVO :Santho Beheer B.V.
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Roy Robin van Dijk
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Takanori Kawaguchi
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Roy Robin van Dijk
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Thomas J. Buechel
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Johnson, Jr. Ozzie W
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Ryoji Irie