Naga 4
ActiveHydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
Yasuhiko Seto
Variety traits
Cold hardiness — Hydrangea serrata
Hydrangea serrata (Thunb.) Ser. var. serrata
The cold hardiness of this species is rated for USDA zones 5b–9a and correlates directly with the survival of flower buds on previous year's growth. Hydrangea serrata is characterized by higher winter hardiness compared to Hydrangea macrophylla.
In the reference 18 varieties crop Tea-of-heaven, where this is mentioned in the description.
For Hydrangea serrata, the key indicator of cold hardiness is the survival of generative buds, which are set on the previous year's shoots. Damage to these buds during winter temperatures or late spring frosts results in a lack of flowering, even if the plant's vegetative mass remains intact.
In terms of agricultural practice, the cultivar winter hardiness range corresponds to USDA zones 5b–9a; however, in regions below zone 6, winter protection of the shrubs is required for successful flowering. The application of potassium fertilizers at the end of the growing season promotes better shoot lignification, increasing resistance to sub-zero temperatures.
General information about the subject — on the page Frost hardiness.
Varieties of Tea-of-heaven 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.
Tsurugi no mai
ActiveHydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
Information regarding the breeder received in the contribution to CPVO :Yamasaki & Fujii
FR
1 record
HSOPR014
TerminatedHydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
Plant Select N.V.
HSPS23
Application submittedHydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
Plant Select N.V.
Chasantiago
ActiveHydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
Information regarding the breeder received in the contribution to CPVO :Challet Herault S.A.S.
FR
1 record
Shinonome
ActiveHydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
Information regarding the breeder received in the contribution to CPVO :Oshima & Mitachi
FR
1 record
Miayama-Yaemurasaki
ActiveHydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
No information of breeder available for this variety
FR
1 record
Angustata
ActiveHydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
No information of breeder available for this variety
FR
1 record
Isusai-Jaku
ActiveHydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
No information of breeder available for this variety
FR
1 record
Ohamacha
ActiveHydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
Information regarding the breeder received in the contribution to CPVO :Makino
FR
1 record
Mihagi-Nishiki
ActiveHydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
No information of breeder available for this variety
FR
1 record
Coerulea Lace
ActiveHydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
Information regarding the breeder received in the contribution to CPVO :Siebold
FR
1 record
Kurenai-Nishiki
ActiveHydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
No information of breeder available for this variety
FR
1 record
Belladonna
ActiveHydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
No information of breeder available for this variety
FR
1 record
Stellata
ActiveHydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
No information of breeder available for this variety
FR
1 record
Crûg Cobalt
ActiveHydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
Information regarding the breeder received in the contribution to CPVO :Wynn-Jones B. & S.
FR
1 record
Avelroz
ActiveHydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
Information regarding the breeder received in the contribution to CPVO :Doll M.F. & Y.
FR
1 record
Beni-Yama
ActiveHydrangea serrata (Thunb.) Ser. var. serrata · Tea-of-heaven
No information of breeder available for this variety
FR
1 record