In zones colder than 10 it is a frost tender perennial that is grown in as an annual. It is noted for its tolerance to hot and humid summers. It is easily grown in average to moderately fertile, moist, well-drained soils in full sun to full shade. Generally appreciates some afternoon shade.. Plants are best with consistent moisture throughout the growing season, but will tolerate some short periods of drought. Start seeds indoors 6-8 weeks before last frost date, purchase starter plants or take cuttings from overwintered plants. Set plants out after last frost date. Container plants may be cut back in fall and overwintered indoors a cool location with reduced watering. Propagation from seed can be difficult due to the small size of the seed, and seed should not be sown directly in the garden.
