There are only two evergreen species, Agapanthus africanus and Agapanthus praecox, but it might be difficult to find them for sale under those names. Check instead for one of the many beautiful ...

A member of the Iris plant family (Iridaceae). (Courtesy Tom Karwin) Lily of the Nile (Agapanthus praecox spp. orientalis 'Getty White'). This is a cultivar of the popular garden plant that ...