Easily grown in average, medium moisture, well-drained soils in full sun. Becomes weedy and sparse with diminished flowering performance if not grown in full sun. Does poorly in wet, poorly draining conditions. Will adapt to clay soil if properly amended. In USDA Zones 5 and 6, this plant will often die to the ground in winter and therefore is often grown as a herbaceous perennial. Even if plants do not die to the ground in winter, they usually grow more vigorously, produce superior flowers and maintain a better shape if cut close to the ground in late winter each year. Removal of spent flower spikes during the growing season may encourage additional bloom. Miss Ruby plants reportedly produce few seeds (almost sterile) and infrequently sucker in the garden. They flower continuously from June to frost, with no need to deadhead spent blooms.