Plumbago Leadwort (Ceratostigma plumbaginoides) may have the most awkward name of all for a delicate-looking plant. Essentially a groundcover, it features sprinklings of pale blue flowers in late summer through fall amidst neat, attractive foliage. It can do well with as little as 2 hours of sun per day, spreads, and can grow to 18 inches tall. An excellent plant especially for perennial borders.