What: Ceratostigma willmottianum, commonly called Chinese plumbago, is a bushy perennial that sports electric-blue flowers that sparkle among its late summer foliage. Flowering will start in late July and continue through early autumn, providing lots of brilliant color to the landscape. It is surprisingly drought-tolerant and loves a baking hot location.
Where: This plumbago thrives in a hot spot with full sun or light shade in rich, well-drained soil.
Size: The plant grows to be 3 feet by 5 feet when mature.
Care: Occasional summer watering during dry periods is best. Prune to the ground in winter.
— Richie Steffen, Great Plant Picks