Cultivation
Hydrangea macrophylla (Thunb.) Ser.
Growing Hydrangea macrophylla outdoors requires protecting flower buds on previous year's shoots and managing soil acidity to control inflorescence color.
In the reference 130 varieties crop Bigleaf hydrangea, where this is mentioned in the description.
The main difficulty in cultivation lies in overwintering the flower buds that form on the previous year's shoots; their loss prevents the plant from blooming. In regions with cold climates, preference is given to remontant varieties capable of forming inflorescences on current year's shoots.
The plant is demanding regarding light conditions, preferring morning sunlight and protection from direct midday sun, which causes overheating of the root system. Regular watering is essential to maintain turgor, as during drought, the concentration of cell sap rises above 10%, leading to wilting.
The color of the inflorescences directly depends on the soil pH level: with an acidic reaction (5,2–6,2), aluminum becomes available, turning the petals blue, whereas on neutral and slightly alkaline soils, they acquire pink or red shades. Planting requires fertile, moisture-retentive substrates based on peat, coniferous soil, and humus.
General information about the subject — on the page Open field.
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
Information regarding the breeder received in the contribution to CPVO :HBA B.V.
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
SANTHO BEHEER B.V.
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Kolster Holdings BV
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Hydrangea Breeders Association B.V.
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Hydrangea Breeders Association B.V.
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Hydrangea Breeders Association B.V.
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
van Dijk Roy Robin
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Ryoji Irie
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
SANTHO BEHEER B.V.
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Wood Timothy D
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Shouji SAKAMOTO (JP)
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
van Dijk Roy Robin
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
Hydrangea Breeders Association B.V.
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Hydrangea Breeders Association B.V.
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Hydrangea Breeders Association B.V.
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Information regarding the breeder received in the contribution to CPVO :Ebihara H.
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
WJG & JG, Hofstede
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Hydrangea Breeders Association B.V.
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Schroll Management ApS
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Information regarding the breeder received in the contribution to CPVO :Sonneville G.
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
Cornelis Pieter Eveleens
Hydrangea macrophylla (Thunb.) Ser. · Bigleaf hydrangea
J.W.P. Kolk Bloemen B.V.