Strelitzia alba is unbranched, multi-stemmed and can grow up to 10 m tall. The older stems are woody with leaf scars and often have suckers at the base. Leaves are tufted at the apex, oblong, 2 m long, 0.4-0.6 m broad. They are leathery, opposite, green to greyish and the leaf blade tends to become torn by wind and age. The single boat-shaped flower sphathe appears in autumn to winter (May to July) and is deflexed, dark coloured, glaucous, 250-300 mm long, 60-80 mm high and about 45 mm thick.