Obedient plant is nice for its pink-purple color in late summer and autumn when many other perennials are yellow. It grows 2'-4' tall, likes full sun to part sun, and will grow in average to moist soil. It offers plenty of nectar to pollinators late in the growing season. Obedient plant is much wilder than its name suggests and if it gets some extra moisture it will spread, so put it where you want a lot of it.