Variety traits
Hydrangea serrata (Thunb.) Ser. var. serrata
The winter hardiness of Hydrangea serrata is a determining factor for flowering, as buds are formed on previous year's growth. The species belongs to USDA hardiness zones 6–9 and requires protection at temperatures below –23 °C.
In the reference 36 varieties crop Tea-of-heaven, where this is mentioned in the description.
Hydrangea serrata is characterized by a survival temperature threshold in the range of –17.8 °C to –23.3 °C, which corresponds to USDA hardiness zone 6. Individual specimens may withstand temperatures dropping to –29 °C; however, such conditions are associated with a high risk of significant wood damage.
The flower buds of this species are highly sensitive to cold and spring frosts. Given that inflorescence initiation occurs on old wood, a critical agrotechnical task is to protect the previous year's shoots from freezing by using covering or growing the plants in protected ground.
General information about the subject — on the page Winter 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 serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
Jean-Pierre Challet
Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
Richard Lighty
Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
Wood Timothy D
Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
Marie-France Doll, Yves Doll
Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
Information regarding the breeder received in the contribution to CPVO :Van Trier Harry
Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
Wood Timothy D
Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
No information of breeder available for this variety
Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
No information of breeder available for this variety
Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
Information regarding the breeder received in the contribution to CPVO :De Belder & van Trier
Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
Information regarding the breeder received in the contribution to CPVO :Hamada Akifumi
Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
Plant Select N.V.
Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
Yang Yu-yong
Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
Plant Select N.V.
Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
Information regarding the breeder received in the contribution to CPVO :Inaba Masaru
Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
Information regarding the breeder received in the contribution to CPVO :Inaba Masaru
Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
No information of breeder available for this variety
Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
No information of breeder available for this variety
Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
Information regarding the breeder received in the contribution to CPVO :Yatabe Mototeru
Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
Information regarding the breeder received in the contribution to CPVO :Van Houtte
Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
No information of breeder available for this variety
Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
Information regarding the breeder received in the contribution to CPVO :Tada Shigeru
Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
Information regarding the breeder received in the contribution to CPVO :Hamada Akifumi
Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
No information of breeder available for this variety
Hydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
Information regarding the breeder received in the contribution to CPVO :Haworth-Booth M.