How to Prune African lily 'Storm Cloud'?
In late autumn remove or tidy up any remaining leaves, but seedheads can be left as they look attractive over winter

African lily 'Storm Cloud' · Agapanthus 'Storm Cloud'
Grow in fertile, moist but well-drained soil in full sun or grow in a container. In cold areas, mulch well overwinter and take containers under cover. See agapanthus cultivation
In late autumn remove or tidy up any remaining leaves, but seedheads can be left as they look attractive over winter