Summer/fall bloomFrost tender
Plant in full sun in good garden soil when weather is warm and settled, all danger of frost is past and both days and nights are evenly in the 50°F (10°C) range. Poke seeds into well-worked soil about 1/2 inch deep, 4 to 5 inches apart. Press soil firmly over seeds and keep moist until seedlings emerge in 8 to 10 days. When seedlings are large enough to handle, thin seedlings to final spacing of 1 foot apart so these tall plants will have ample room to grow. Extra thinned seedlings can be transplanted easily.
Several weeks before last frost date, sow seeds 1/2 inch deep in individual pots of well-drained seed starting mix. Keep moist and provide a strong light source until seedlings are well established and ready to plant outside. Transplant carefully, disturbing the roots as little as possible. Space seedlings 1 foot apart so plants will have room to mature.