Rosa 'Queen Sirikit' (Queen Sirikit Rose)


Botanical Information

FamilyRosaceae
GenusRosa
Cultivar'Queen Sirikit'
CategoryWoody
TypeShrub (deciduous)
OriginA hybrid rose of 'Königin der Rosen' and 'Golden Giant Rose'. It was first introduced in 1968. The flower was named after Queen Sirikit of Thailand.

Details

USDA Hardiness Zone5 - 11
USDA Hardiness Ref.
Canadian Hardiness Zone6 - 9b
Canada Hardiness Ref.
RHS Hardiness ZoneH7 - H1c
RHS Hardiness Ref.
Temperature (°C)-20 - 5
Flowering PeriodApril

Description and Growing Information

LandscapeBorders, hedges, flower beds, containers, and as a cut flower.
PropagationSoftwood cuttings can be taken once the first bloom occurs in spring to summer, hardwood cuttings should be taken in autumn.
CultivationGrow in full sun with fertile, humus-rich, moist but well-drained soil. For best flowering apply a balanced fertiliser and mulch in late winter or early spring and a balanced fertiliser again in early summer.
PestsAphids, leafhoppers, spider mites, scale insects, caterpillars, mildew, dieback, canker, viruses, rust and rose slugs.
Notable SpecimensQueen Sirikit Botanic Garden, Mae Rim District, Chiang Mai Province, Thailand.
HabitatHorticultural origin.
Leaf DescriptionDeep super-glossy green, margins serrate, odd pinnate, 4 leaflets in rows with one at the tip. Medium size, up to 10 cm diameter
Flower DescriptionA yellow colour that turns into a yellowish orange with tints of pink at the edges of the petals under strong sunlight. The plant blooms year round, with an average flower measuring 5 – 10 cm in diameter.
Texture DescriptionThe scent of the flowers is described to be a 'gentle fragrance'.

Photographs