Rose Jubilee Celebration

Flowers are very original and easily distinguished from other English roses. They start as very full rosettes, gradually maturing into dome-shaped blooms. Describing their color proves challenging due to its rapid transformation, but one could characterize it as a dusky pink with a hint of yellow on the reverse of the petals, resulting in a distinctive and pleasing two-tone effect. The fragrance is strong and fruity, a hint of fresh lemon and raspberry.

DESCRIPTION OF THE VARIETY
The following is a detailed description of ‘Jubilee Celebration’ rose with color descriptions using terminology in accordance with The Royal Horticultural Society (London) Colour Chart, except where ordinary dictionary significance of color is indicated.

FLOWERING
Blooms in flushes throughout the season, starting from mid-season and stopping after the first frosts. There are usually two to three flowering periods, with a total duration of more than ten weeks.

Flower bud:
The flower buds are large, have an ovoid shape. When sepals first divide, bud color is medium green. When sepals first divide, bud color is orange pink upper surface and light red pink on the lower surface with tint of yellow. They are borne in small clusters with 3, 5 to 7 blooms together, having irregular shape.

Sepals have medium yellow green colour on the lower surface with light purple red intonation and smooth surface; the colour of the upper surface is medium green and the surface is moderately pubescent. There are three lightly appendaged sepals and two unappendaged sepals with hairy edges.

Bloom:
The flowers are large and very full, the average diameter of the open flower is about 9 cm (3.5").

The flowers upon opening have domed rosette shape. When viewed from the above they appeared to have irregularly rounded shape, when viewed from the side the flower shape appears flat on upper part and concave on lower part, the petals in the center of the flower infold together.

The colour of the flowers of the ‘Jubilee Celebration’ have quite complex and rapidly changing colour. They start as red pink with a hint of yellow on the reverse of the petals, fading to light blue pink with age, creating an overall salmon-pink or coral pink colour impression.

The general tonality of the flowers is pink (RHS Group 49A) with medium yellow (RHS Group 9A) on the reverse of the petals, creating overall salmon-pink or coral pink colour impression. As the flower ages the colours fade to light blue pink (RHS Group 55C).

Petals:
The petals have silky and smooth surface, they are relatively large. The colour of the petals on the middle zone of outer side is middle light orange (RHS Group 24C), marginal zone of outer side is light red-pink; the middle zone of inner side of the petals is medium orange pink (Group 37A) and the marginal zone of inner side of the petals is pink (RHS Group). The petals reflex slightly and have some undulation on the margins. The basal petal spot on the petals is medium sized and has medium yellow colour (RHS Group 9A).

The flowers last on the plant for about 4 days, as a cut flower also about 4 days. Petals drop off cleanly before drying.

Fragrance:
The fragrance of the ‘Jubilee Celebration’ is strong, deliciously fruity with hints of fresh lemon and raspberry.

Reproductive parts:
The filament have yellow colour.

Styles are medium sized, have yellow-green colour; there is a weak hairiness on the upper half of the styles; they are positioned below anthers.

Receptacle is medium green, pitcher shaped, medium sized and have smooth surface.

PLANT
The variety ‘Jubilee Celebration’ is classified as a shrub rose from a English shrub rose collection. The variety has bushy, moderately vigorous growth habit. Forms medium sized, bushy, well-branched, rounded plant. Its robust growth is complemented by an unusually graceful demeanor, with arching branches that spread widely, creating a broad shrub.

The mature and well established plant forms rounded plant with average height of about 120 – 125 cm (4") and width of about 120 – 125 cm (4'). Its attractive growth habit makes it a good choice for any garden or landscape.

Foliage:
The quantity of foliage is medium, it has semi-glossy appearance and leathery texture. The leaves are medium sized, the leaf length is 15.7 cm (6.2 inches) on average and the width of about 10.8 cm (4.2 inches). Normal mid stem leaves have 5 leaflets.

Leaflets:
The leaflets have dentate margin, leathery texture, obtuse base. The colour of the leaflets is medium green on upper side with medium glossiness on upper side.

Stems:
The primary branches are lengthy, curving forward to present sizable flowers in compact sprays. The colour of the young shoots is medium green with reddish brown anthocyanin of the medium intensity.

Prickles:
The prickles of this variety have deep concave shape, the colour is green and red.

Small prickles:
There are few to none small prickles on the main canes and on the laterals, there are also few to none small prickles on peduncles.

Disease resistance:
The variety ‘Jubilee Celebration’ has good disease resistance to mildew, rust and botrytis under normal growing conditions. The resistance to black spot is good to moderately good in colder and wet climate conditions. Pest resistance – not tested.

The variety is recommended for growing without winter protection in climate zones USDA 6b through 10b.

This rose was named to honor and celebrate the the Queen Elizabeth's Golden Jubilee in 2002.

English Shrub Rose

ORIGIN OF THE VARIETY
The rose variety 'Aushunter' / ‘Jubilee Celebration’ originated by David Austin from a cross between 'Ausgold' / ‘Golden Celebration’ as the seed parent and an unnamed pollen parent. Selection criteria included plant growth habit and repeated flowering.

COMPARISON WITH PARENTS
'Aushunter' / ‘Jubilee Celebration’ plants have a lower, bushier and arching growth as compared to much larger amd the more upright growth habit of 'Ausgold' / ‘Golden Celebration’ and its flowers are more domed, rosette shaped flowers and have salmon pink colour compared to deep cupped and golden yellow flowers of 'Ausgold' / ‘Golden Celebration’ .

COMPARISON WITH THE CLOSEST COMMERCIALLY AVAILABLE CULTIVAR
The most similar variety is ‘Ausjump’ / ‘Christopher Marlowe’. 'Aushunter' / ‘Jubilee Celebration’ has a more upright growth habit than ‘Ausjump’ / ‘Christopher Marlowe’. Also 'Aushunter' / ‘Jubilee Celebration’ has a larger leaf and larger flower diameter comparing to ‘Ausjump’ / ‘Christopher Marlowe’. 'Aushunter' / ‘Jubilee Celebration’ differs slightly from ‘Ausjump’ / ‘Christopher Marlowe’ in flower colour, which has red pink or salmon-pink colour (Group 52B) and at the end of the third day fades to medium blue pink (Group 54C).

USDA zone 6 and warmer