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Hibiscus syriacus 'Oiseau Bleu'
common name: Shrubby Mallow, Rose of Sharon
synonyms: Hibiscus syriacus 'Blue Bird'
growth rate: medium
growth habit: erect
leaf colour: green
flower colour: violet
main season: Summer
dry soil, moist soil, sandy soil
preferred soil pH: neutral-alkaline
minimum temp: -12°C
USDA zone: 7 to 9
Single violet-blue flowers, flushed with red at the centres.
Reasonably fertile, humus-rich, moist, well drained soil in full sun. Performs best in areas with long hot summers.
Prune in early spring. On established plants, some old stems can be cut back hard.