<i>Hydrangea </i>plant named ‘H220908’

Abstract

A new and distinct cultivar of Hydrangea plant named ‘H220908’, characterized by its upright and uniformly mounded plant habit; vigorous growth habit and rapid growth rate; freely branching habit with strong, thick and sturdy stems; freely and uniformly flowering habit; large mophead-type inflorescences with numerous yellow green and purplish red-colored sterile flowers; and good postproduction longevity.

Claims

1. A new and distinct Hydrangea plant named ‘H220908’ as illustrated and described.

Description

BRIEF DESCRIPTION OF THE PHOTOGRAPHS

(1) The accompanying colored photographs illustrate the unique appearance of the new Hydrangea plant showing the colors as true as it is reasonably possible to obtain in colored reproductions of this type. Colors in the photographs may differ from the color values cited in the detailed botanical description which accurately describe the colors of the new Hydrangea plant.

(2) The photograph on the first sheet (FIG. 1) is a side perspective view of a typical flowering plant of ‘H220908’.

(3) The photograph on the second sheet (FIG. 2) is a close-up view of typical inflorescences of ‘H220908’.

(4) The photograph on the third sheet (FIG. 3) is a top perspective view of a typical flowering plant of ‘H220908’ that has been “blued”, that is, treated with aluminum sulfate.

DETAILED BOTANICAL DESCRIPTION

(5) Plants used in the aforementioned photographs and in the following description were grown during the late spring and early summer in 13-cm containers in a glass-covered greenhouse in De Kwakel, The Netherlands and under cultural practices typical of commercial Hydrangea production. During the production of the plants, day and night temperatures averaged 17° C. Plants of the new Hydrangea were one year old when the photographs and description were taken. Plants of the new Hydrangea can be successfully treated with aluminum sulfate to “blue” the inflorescences. In the following description, color references are made to The Royal Horticultural Society Colour Chart, 2015 Edition, except where general terms of ordinary dictionary significance are used. Botanical description: Hydrangea macrophylla ‘H220908’. Parentage: Female, or seed, parent.—Proprietary selection of Hydrangea macrophylla identified as code number 208156-028, not patented. Male, or pollen, parent.—Hydrangea macrophylla ‘Horwack’, disclosed in U.S. Plant Pat. No. 25,577. Propagation: Type cutting.—By vegetative tip cuttings. Time to initiate roots, summer.—About two weeks at temperatures about 23° C. Time to initiate roots, winter.—About 18 days at temperatures about 20° C. Time to produce a rooted young plant, summer.—About four weeks at temperatures about 23° C. Time to produce a rooted young plant, winter.—About five weeks at temperatures about 20° C. Root description.—Thick; typically whitish brown in color, actual color of the roots is dependent on substrate composition, water quality, fertilizer type and formulation, substrate temperature and physiological age of roots. Rooting habit.—Freely branching; dense. Plant description: Plant and growth habit.—Upright and uniformly mounded plant habit; strong and sturdy stems; rapid growth rate and vigorous growth habit. Plant height.—About 25 cm to 30 cm. Plant diameter or area of spread.—About 45 cm to 50 cm. Lateral branch description: Branching habit.—Freely branching habit; when pinched, about 14 lateral branches develop per plant. Length.—About 20 cm. Diameter.—About 6 mm. Internode length.—About 3 cm to 5 cm. Texture.—Smooth, glabrous; fully developed, woody. Aspect.—Upright to about 20° from vertical. Strength.—Strong, sturdy. Color.—When developing: Close to 146C; at internodes, close to 187A; lenticels, close to 187A. Developed: Close to 146C; at the internodes, close to 187A; when woody, close to 177D; lenticels, close to 187A. Leaf description: Arrangement.—Opposite, simple. Length.—About 9 cm to 12 cm. Width.—About 6 cm to 9 cm. Shape.—Ovate. Apex.—Acuminate to cuspidate. Base.—Obtuse. Margin.—Dentate to serrate. Texture, upper and lower surfaces.—Rugose, glabrous. Venation pattern.—Pinnate. Color.—Developing and fully expanded leaves, upper surface: Close to NN137B; venation, close to 146C. Developing and fully expanded leaves, lower surface: Close to 138B; venation, close to 146D. Petioles.—Length: About 2 cm to 3 cm. Diameter: About 3 mm. Texture, upper and lower surfaces: Smooth, glabrous. Color, upper surface: Close to 145B. Color, lower surface: Close to 145C. Flower description: Flower type and habit.—Showy sterile flowers and small inconspicuous fertile flowers arranged on mophead-type terminal panicles; panicles globular in shape; fertile and sterile flowers face upright to outwardly depending on their position in the inflorescence. Fragrance.—None detected. Natural flowering season.—Plants flower naturally in the early summer and is continuous throughout the summer in Northern Europe. Flower longevity.—Fertile flowers last about one month on the plant, fertile flowers not persistent; sterile flowers last about four months on the plant, sterile flowers persistent. Quantity of flowers.—Freely flowering habit; about 30 fertile flowers per panicle and about 100 sterile flowers per panicle. Panicle height.—About 8 cm to 10 cm. Panicle diameter.—About 18 cm to 25 cm. Fertile flower buds.—Length: About 3 mm. Diameter: About 3 mm. Shape: Flattened globular. Color: Close to 73C. Sterile flower buds.—Length: About 3 mm. Diameter: About 3 mm. Shape: Flattened globular. Color: Close to 73B. Fertile flower diameter.—About 6 mm. Fertile flower depth (height).—About 5 mm. Sterile flower diameter.—About 4.5 cm. Sterile flower depth (height).—About 1 cm. Petals, fertile flowers.—Quantity and arrangement: Four in a single whorl. Length: About 3.5 mm. Width: About 2 mm. Shape: Ovate. Apex: Acute. Base: Obtuse. Margin: Entire. Texture, upper and lower surfaces: Smooth, glabrous. Color: When opening, upper and lower surfaces: Close to 69A. Fully opened, upper surface: Close to 63B; color does not change with development. Fully opened, lower surface: Close to 63D; color does not change with development. Petals, sterile flowers.—Quantity and arrangement: Four in a single whorl. Length: About 4 mm. Width: About 2 mm. Shape: Ovate. Apex: Acute. Base: Attenuate. Margin: Entire. Texture, upper and lower surfaces: Smooth, glabrous. Color: When opening, upper and lower surfaces: Close to 63B. Fully opened, upper and lower surfaces: Close to 63B; color does not change with development. Sepals, fertile flowers.—Quantity and arrangement: Five in a single whorl. Length: About 2 mm. Width: About 2 mm. Shape: Ovate. Apex: Acute. Base: Obtuse. Margin: Entire. Texture, upper and lower surfaces: Smooth, glabrous. Color: When opening, upper and lower surfaces: Close to 141B. Fully opened, upper surface: Close to 141B; color does not change with development. Fully opened, lower surface: Close to 146B; color does not change with development. Sepals, sterile flowers.—Quantity and arrangement: Four in a single whorl. Length: About 2 cm. Width: About 2 cm to 2.5 cm. Shape: Rounded. Apex: Acute. Base: Obtuse. Margin: Entire. Texture, upper surface: Smooth, glabrous. Texture, lower surface: Rugose, glabrous. Color: When opening, upper surface: Close to 144C becoming closer to 63A with development. When opening, lower surface: Close to 144D. Fully opened, upper surface: Close to 144A becoming closer to 63A with development; when “blued”, close to 145A becoming closer to N87A with development. Fully opened, lower surface: Close to 145C becoming closer to 73B with development. Pedicels, fertile flowers.—Length: About 1 cm. Diameter: About 1 mm. Strength: Moderately strong. Aspect: Mostly upright. Texture: Smooth, glabrous. Color: Close to 63D. Pedicels, sterile flowers.—Length: About 3 cm to 4 cm. Diameter: About 1.5 mm. Strength: Strong. Aspect: Erect to about 45° from vertical. Texture: Smooth, glabrous. Color: Close to 63B. Reproductive organs, fertile flowers.—Stamens: Quantity per flower: Eight. Filament length: About 1 mm. Filament color: Close to 75C. Anther length: About 1 mm. Anther shape: Conical. Anther color: Close to 75B. Pollen amount: Abundant. Pollen color: Close to NN155D. Pistils: Pistil quantity per flower: Three. Pistil length: About 1 mm. Stigma shape: Oval. Stigma color: Close to 186C and 75B. Style length: About 1 mm. Style color: Close to 75C. Ovary color: Close to 75C. Reproductive organs, sterile flowers.—Stamens: Quantity per flower: About eight. Filament length: About 2 mm. Filament color: Close to 75C. Anther length: About 1 mm. Anther shape: Conical. Anther color: Close to 75B. Pollen amount: Abundant. Pollen color: Close to NN155D. Pistils: Pistil quantity per flower: Three. Pistil length: About 1 mm. Stigma shape: Oval. Stigma color: Close to 75B. Style length: About 1 mm. Style color: Close to 75B. Ovary color: Close to 75C. Seeds, only produced by fertile flowers.—Quantity per fertile flower: About 20 to 30. Length: About 0.5 mm. Diameter: About 0.1 mm. Color: Close to 200C. Pathogen & pest resistance: Under commercial production conditions, plants of the new Hydrangea have not been observed to be resistant to pathogens and pests common to Hydrangea plants to date. Temperature tolerance: Plants of the new Hydrangea have been shown to be tolerant to temperatures ranging from about 3° C. to about 38° C.