Aloe suprafoliata is a medium sized aloe and can grow up to 1m tall. It is usually stemless or has a short stem with the leaves arranged in a flat fan in young plants and grows into a rosette in maturing plants. The leaves are about 300-400 x 70mm large and a blueish to silvery grey-green colour that turns a reddish colour towards the dry twisted tip, the margins have sharp red-brown teeth. The unbranched inflorescence are about 250x100mm large and densely packed by large round silvery bracts, red with blue tips. The flowers are about 50mm long and a deep pink to scarlet colour borne between May to July.Aloe suprafoliata is an ideal specimen for a rockery or mixed succulent garden bed that need some watering during summer and prefers to not stand in harsh afternoon sun.
As the common name, Book Aloe, of Aloe suprafoliata indicates, the leaves lie in a single plane when the plants are young.