Hibiscus Oiseau Blue ,p>A late flowering shrub that comes into its own when others are looking tired, this has large, trumpet-shaped, bright blue flowers 8cm (3in) across with red centres from late summer to mid-autumn. The leaves are pretty too, three lobed, dark green and very distinctive. This deciduous shrub has an exotic feel to it, but is just at home in a herbaceous border as it is in a tropical-style garden. It is best planted in a sunny spot as it does need a long, hot summer to flower well. It has one limitation - the new foliage doesn't appear until late spring.