Million Bells. Perennial: Vigorous, semi-trailing, floriferous & early-blooming make the Noa series an excellent choice for patio combinations, hanging baskets, window boxes & pots. Self cleaning, sun loving & self maintaining. Produces an abundance of small, Petunia-like flowers spring-fall. Bloom color: medium blue. Height: 8". Width: 12". Attracts hummingbirds. Plant in full sun in moist, well-drained soil. Avoid overwatering.