Best grown in humusy, fertile, consistently moist, well-drained soils in full sun. Tolerates very light shade, and appreciates some afternoon protection from the hot sun in southern climates. Pinch stems back as needed from late spring to mid-summer (e.g., Memorial Day to the 4th of July) to control height and to encourage bushy vegetative growth. For best bloom, feed plants several times during the growing season. Cut plants back to 6” after flowering and mulch (e.g., straw or evergreen boughs) for winter. Divide as needed (usually every 2-3 years) in spring or fall.