Easily grown in average, dry to medium, well-drained soil in full sun. Prefers moist, gravelly or sandy soils with good drainage, but tolerates drought. 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 become somewhat floppy and open up as the summer progresses, particularly in humid climates. If plants flop or otherwise 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.