Acanthus sennii

Acanthus sennii is an unusual acanthus, native to the highlands of Ethiopia. Tall growing, it has incredibly spiny, holly-like silvery green leaves with prominent white veining, from which a central spike of red flowers appears from late-summer to autumn. It makes a fantastic plant for a tropical planting scheme, where both its leaves and flowers make for a dramatic display.

Surprisingly hardy, Acanthus sennii will die back in autumn but regrow in spring, and is best treated as a herbaceous perennial. Alternatively, grow it in a large container in a conservatory or greenhouse, where it may provide an evergreen display.

Grow Acanthus sennii in free-draining soil or compost, preferably with the addition of sharp sand to further aid drainage, in full sun to partial shade. Protect from winds and stake if plants are likely to flop. Keep dry in winter to prevent the rootball rotting.