‘Blue Danube’ is a dwarf evergreen Rhododendron/Azalea with small, glossy, mid- to olive-green leaves with plentiful small, funnel-shaped, blue-violet flowers in late spring. It has a dense habit and is ideal for rockeries or borders. Prefers acidic soil conditions, so should be planted with Ericaceous compost. Full sun to partial shade is ideal. Height and spread 70-90cm.