Often known as Lily of the Nile, Agapanthus 'Twister' is a bit smaller than some other varieties and has delightful bi-colored flowers in mid- to late summer. Large clusters of blue-throated, white petaled flowers make it a favorite of bees, hummingbirds, and other pollinators, and is an excellent cut flower. The broad, strap-like green leaves are tidy enough to plant along borders, forming mounds less than two feet tall and wide, and are drought-tolerant once established.