More ideas from Louise
Agapanthus africanus is an evergreen perennial with good strappy leaves.  This South African native bears stout erect stems with umbels of funnel-shaped, blue flowers and it looks great in pots or planted in swathes in sun or partial shade.  It makes 0.5-1m in height with a spread of 0.5m.

Agapanthus africanus Agapanthus are clump-forming perennials with narrowly strap-shaped leaves, evergreen in some species, and erect stems bearing umbels of funnel-shaped blue or white flowers