H20-02
ActiveHydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Ryoji Irie
Hydrangea macrophylla (Thunb.) Ser. Bigleaf hydrangea · Ornamentals · bred by Information regarding the breeder received in the contribution to CPVO :Preisig (Haller)
also searched as: кастелн
10 August 2026
Kasteln is characterized by dark pink flowers, the color of which can change to blue shades depending on soil acidity and aluminum content. The variety is known as an object of agrotechnical research on growth regulation using regulators and preparation for forcing via ethylene treatment for defoliation.
In professional floriculture, the variety demonstrates susceptibility to phytopathogens typical for the species, including viruses affecting hydrangeas. Currently, the main information about the variety is of an archival nature and is limited to data from professional studies of the last century.
1 jurisdiction
Green indicates countries where the variety is listed in the national catalogue and its seeds are authorized for sale. Expired registrations are marked separately: the variety was previously admitted, but sale is no longer permitted.
Records are sourced from official registry publications. Data sources and legal status
The directory replicates the primary source. If an entry differs from the official publication, please specify the discrepancy and provide a link if possible. Corrections are added to the moderation queue.
This is a directory, not an official registry: data is based on public disclosures and may have changed. More about sources
Same species
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Ryoji Irie
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Michael Dirr
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Kolk Jacobus W. P.|1187 NK Amstelveen, NL
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Information regarding the breeder received in the contribution to CPVO :Wädenswil
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Information regarding the breeder received in the contribution to CPVO :Moll
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Information regarding the breeder received in the contribution to CPVO :Kayamata et al.
Nearby in the species list Juno, Jupiter, K. Hartlieb, Kachofugetsu, Kaho, Kaleidoscope, Kamosere Arigatou, Kamosere Gokigenyo, Kardinal, Karl Spitterler, Katuranorokumeikan, Kaye Leslie, Kazan, KD1, KD5, KD7, Keep, Kifu-Gaku, King George, King George V