Azalea plant named 'RLH1-9P7'

Abstract

A new and distinct cultivar of Azalea plant named RLH1-9P7, characterized by its relatively compact, upright to outwardly spreading and globose plant habit; freely basal branching habit; dense and bushy appearance; vigorous growth habit and rapid growth rate; evergreen, persistent dark green-colored leaves that do not abscise during the winter; freely flowering habit with remontant flowering during the spring, summer and autumn; large, non-persistent single to semi-double flowers that are hot pink in color during the spring and becoming more rose red in color during the summer; and excellent garden performance and temperature tolerance.

Claims

1. A new and distinct cultivar of Azalea plant named RLH1-9P7 as illustrated and described.

Description

BRIEF DESCRIPTION OF THE PHOTOGRAPHS

[0030] The accompanying colored photographs illustrate the overall appearance of the new Azalea 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 slightly from the color values cited in the detailed botanical description which accurately describe the colors of the new Azalea plant. Plants used in the photographs were ten years old. The photograph on the first sheet is a top perspective view of a typical flowering plant of RLH1-9P7 grown during the summer. The photograph on the second sheet is a close-up view of a typical flowering plant of RLH1-9P7 grown during the spring.

DETAILED BOTANICAL DESCRIPTION

[0031] The aforementioned photographs, following observations and measurements describe plants grown during the spring and summer in 5.7-liter containers in a shadehouse in Seneca, S.C. and under cultural practices typical of commercial Azalea production. During the production of the plants, day temperatures ranged from 5 C. to 40 C. and night temperatures ranged from 25 C. to 35 C. Plants used for the detailed description were two years old. In the following description, color references are made to The Royal Horticultural Society Colour Chart, 2007 Edition, except where general terms of ordinary dictionary significance are used. [0032] Botanical classification: Rhododendron hybrida RLH1-9P7. [0033] Commercial classification: Evergreen Azalea. [0034] Parentage: [0035] Female, or seed, parent.Proprietary selection of Rhododendron hybrida identified as code number RLH-1900-RP, not patented. [0036] Male, or pollen, parent.Rhododendron hybrida Saybrook Glory, not patented. [0037] Propagation: [0038] Type.By semi-hardwood stem cuttings. [0039] Time to initiate roots, summer.About 25 to 30 days at temperatures of 27 C. to 30 C. [0040] Time to initiate roots, winter.About 35 to 45 days at temperatures of 16 C. to 17 C. [0041] Time to produce a rooted young plant, summer.About 60 to 70 days at temperatures of 27 C. to 30 C. [0042] Time to produce a rooted young plant, winter.About 80 to 100 days at temperatures of 16 C. to 17 C. [0043] Root description.Fine, fibrous; initially white in color becoming light brown with development; actual color of the roots is dependent on substrate composition, water quality, fertilizer type and formulation, substrate temperature and physiological age of roots. [0044] Rooting habit.Freely branching; dense. [0045] Plant description: [0046] Plant form, plant and growth habit.Perennial and evergreen flowering subshrub; relatively compact, upright to outwardly spreading and globose plant habit; vigorous growth habit; rapid growth rate; freely flowering habit with numerous single to semi-double flowers. [0047] Branching habit.Freely branching habit with lateral branches potentially developing at every node; dense and bushy appearance; pinching (removal of terminal apex) enhances lateral branch development. [0048] Plant height, soil level to top of flowers.About 28 cm. [0049] Plant diameter, area of spread.About 51 cm. [0050] Lateral branch description.Length: About 14 cm. Diameter at base: About 3.5 mm. Internode length at fully developed upper leaf axils: About 1 cm. Strength: Strong. Aspect: Upright to outwardly spreading. Texture, developing: Pubescent, fine rusty brown-colored hairs. Texture, mature: Woody; glabrous. Color, developing: Close to 146B to 146C. Color, semi-hardwood: Close to 146B to 146C becoming close to 165A with development. Color, mature: Close to N199B. [0051] Leaf description.Arrangement: Alternate; simple. Leaf retention: Very good winter leaf retention has been observed on plants of the new Azalea. Length: About 4.2 cm. Width: About 1.75 cm. Shape: Elliptic, oblong to oblanceolate. Apex: Acute; mucronulate. Base: Cuneate to attenuate. Margin: Entire; ciliate. Venation pattern: Pinnate; reticulate. Texture, upper and lower surfaces: Pubescent; coriaceous, tough. Color: Developing leaves, upper surface: Close to N137A. Developing leaves, lower surface: More green than 137B. Fully expanded leaves, upper surface: Close to N137A to N13713; venation, close to 146A to 146B. Fully expanded leaves, lower surface: Close to 146B; venation, close to 146B to 146D. Petioles: Length: About 9 mm. Diameter: About 2 mm. Texture, upper and lower surfaces: Pubescent. Color, upper and lower surfaces: Close to 146B to 146C. [0052] Flower description: [0053] Flower appearance and arrangement.Single to semi-double iridescent flowers arranged upwardly to outwardly in clusters at terminals and sub-terminals; single whorl of five petals fused towards the base surrounding one to eight petaloids; petaloid development is typically observed on summer flowers. [0054] Natural flowering season.Spring, April to May, and then remontant flowering during the summer and autumn, July to October or until frost in USDA Hardiness Zone 6b. [0055] Flowering habit.Freely flowering habit with usually about two to three flowers per cluster. [0056] Flower longevity.Flowers are durable and long-lasting; depending on the temperature, flowers last about five to ten days on the plant, dependent on ambient temperatures; flowers not persistent. [0057] Fragrance.None detected. [0058] Flower diameter.About 6.5 cm to 10.5 cm. [0059] Flower depth.About 5 cm. [0060] Flower buds (before showing color).Length: About 1 cm. Diameter: About 5 mm. Shape: Ovoid. Color: Close to 144A. [0061] Petals.Length: About 5.5 cm. Width: About 3.75 cm. Shape: Broadly ovate to orbicular; roughly spatulate. Apex: Rotund or occasionally emarginate; undulate. Margin: Entire; undulate. Texture, upper and lower surfaces: Smooth, glabrous; rugulose; waxy to velvety in appearance. Color: When opening, upper surface: Close to N57B to N57C; central spots and speckles, close to 60A. When opening, lower surface: Close to N57B to N57C. Fully opened, upper surface: Close to N57B to N57C; central spots and speckles, close to between 53A and 60A; during the summer, color shifts to closer to 53B to 53D with spots and speckles, close to 53A to 53B; petaloids developing during the summer are similar in color. Fully opened, lower surface: Close to N57B to N57C. [0062] Sepals.Arrangement: Five in a single whorl, fused at the base forming a campanulate to star-shaped corona. Length: About 1.4 cm. Width: About 3.5 mm. Shape: Lanceolate. Apex: Acute. Base: Fused. Margin: Entire; ciliate. Texture, upper and lower surfaces: Pubescent. Color, upper surface: Close to 144B. Color, lower surface: Close to 144A. [0063] Peduncles.Length: About 1 cm. Diameter: About 3 mm. Angle: Mostly upright to outwardly. Strength: Strong; flexible. Texture: Pubescent. Color: Close to 144A to 144B. [0064] Reproductive organs.Androecium: Quantity of stamens per flower: During the spring, about eight to ten; in the summer, some or all are transformed into petaloids. Filament length: About 3.7 cm to 4.7 cm. Filament color: Close to N57B. Anther shape: Porandrous with four oblong, tubular to lunate-shaped pollen sacks basifixed to the filament. Anther length: About 3 mm. Anther color: Close to 183A. Pollen amount: None observed. [0065] Gynoecium.Pistil length: About 4.5 cm. Stigma shape: Round to flattened (capitate). Stigma color: Close to 59A. Style length: About 4 cm. Style color: Close to N57A. Ovary color: Close to 139A. [0066] Fruits and seeds.Fruit and seed development have not been observed on plants of the new Azalea. [0067] Garden performance & temperature tolerance: Plants of the new Azalea have been observed to be very tolerant to rain, wind and temperatures ranging from about 25 C. to 45 C. Plants of the new Azalea are adaptable for USDA Hardiness Zones 6b to 9. [0068] Disease & pest resistance: Plants have not been observed to be resistant to pathogens and pests common to Azalea plants.