Petunia plant named ‘Sunmilk’

#Botanical designation: Petunia×hybrida.

#Cultivar denomination: ‘Sunmilk’.

#The present application is co-pending with U.S. Plant patent application Ser. No. 11/050,886, Petunia Plant named ‘Sunraspberry’.

#The accompanying colored photographs illustrate the overall appearance of the new cultivar, 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 Petunia.

#The photograph at the top of the sheet comprises a side perspective view of a typical flowering plant of ‘Sunmilk’ grown in a container.

#The photograph at the bottom of the sheet comprises a close-up view of typical flowers of ‘Sunmilk’.

#The aforementioned photographs and following observations and measurements describe plants grown in Yokaichi, Shiga, Japan, in an outdoor nursery during the summer with day temperatures about 22° C. and night temperatures about 12° C. Plants were grown for four months in 15-cm containers. Plants were pinched one time in the spring. Color references are made to The Royal Horticultural Society Colour Chart, 2001 Edition, except where general terms of ordinary dictionary significance are used. Botanical classification: Petunia×hybrida cultivar Sunmilk. Parentage: Female parent.—Proprietary Petunia selection identified as code number PF 165-1, not patented. Male parent.—Proprietary Petunia selection identified as code number PF 171-1, not patented. Propagation: Type cutting.—Terminal vegetative cuttings. Time to initiate roots.—About one week at 18° C. Time to develop roots.—About three weeks at 18° C. Root description.—Fine, fibrous, fleshy; light brown in color. Rooting habit.—Freely branching. Plant description: Form.—Annual flowering plant; indeterminate; outwardly spreading and decumbent plant habit. Viscid and glandular pubescent. Vigorous growth habit. Branching habit.—Freely branching habit with lateral branches developing potentially at every node. Plant height.—About 11.2 cm. Plant diameter.—About 25 cm. Lateral branches.—Length: About 15 cm. Diameter: About 1.5 mm. Internode length: About 9 mm. Texture: Pubescent. Color: 144A. Foliage description.—Arrangement: Alternate, simple; sessile. Length: About 2.9 cm. Width: About 1.9 cm. Shape: Elliptic. Apex: Acute. Base: Cuneate. Margin: Entire. Texture, upper and lower surfaces: Sparsely pubescent; viscid. Venation pattern: Pinnate; reticulate. Color: Developing and fully expanded foliage, upper surface: 146A. Developing and fully expanded foliage, lower surface: 144A. Venation, upper and lower surfaces: Similar to lamina. Flower description: Flower type and habit.—Single salverform flowers; flowers face mostly upward or outward; axillary. Flowers not persistent. Freely flowering habit. Natural flowering season.—Plants flower from spring through late autumn in Japan; flowering continuous during this period. Flower longevity on the plant.—About five days. Fragrance.—None detected. Flower size.—Diameter: About 4.8 cm. Length: About 5 cm. Flower buds.—Length: About 4 cm. Diameter: About 1 cm. Shape: Cylindrical. Color: 145B. Corolla.—Quantity/arrangement: Five petals; fused, funnelform. Petal shape: Roughly spatulate or fan-shaped. Petal apex: Cuspidate. Petal margin: Entire. Petal texture, upper and lower surfaces: Smooth; satiny. Color: Petal, upper surface, when developing and fully expanded: 154D to 155D; venation, 72A to 70C. Petal, lower surface, when developing and fully expanded: 154D to 155D; venation, 72A to 70C. Flower throat (inside): 1D. Flower tube (outside): 1C. Sepals.—Arrangement/appearance: Single whorl of five sepals fused at base, star-shaped. Length: About 1 cm. Width: About 3 mm. Shape: Oblong. Apex: Obtuse. Margin: Entire. Texture, upper and lower surfaces: Pubescent. Color, immature and mature, upper surface: 146A. Color, immature and mature, lower surface: 146B. Peduncles.—Length: About 1.7 cm. Width: About 0.9 mm. Strength: Moderately strong. Texture: Pubescent. Color: 144A. Reproductive organs.—Stamens: Quantity: Five per flower. Anther shape: Ellipsoidal. Anther length: About 2 mm. Anther color: 159D. Pollen amount: Moderate. Pollen color: 1C. Pistils: Quantity: One per flower. Pistil length: About 2 cm. Style length: About 1.8 cm. Style color: 145B. Stigma shape: Broadly elliptic. Stigma color: 154C. Ovary color: 144A. Seed/fruit.—Seed and fruit development have not been observed. Disease/pest resistance: Plants of the new Petunia have not been noted to be resistant to specific pathogens and pests common to Petunia. Garden performance: Plants of the new Petunia have been observed to have good garden performance and tolerate rain, wind and tolerated temperatures from 5° C. to 35° C.