Easily grown in average, dry to medium, well-drained soil in full sun. Tolerates drought. Prefers moist, gravelly or sandy soils with good drainage. Plants may repeat bloom throughout the summer, but need regular moisture to encourage this. Remove spent flower spikes to help extend the bloom period. Plants may open up as the summer progresses, particularly in humid climates. If plants depreciate in summer to the point where they look unsightly, consider cutting them back to the basal foliage. In any event, cut plants back after flowering has concluded.