Sow indoors in flats, individual pots or peat pots. When plants are 2 to 3 inches in height thin or transplant 10 to 12 inches apart. Transplant indoor started seedlings outdoors after all danger of frost has passed and weather has warmed considerably. Approximately one week at 70 degree temperatures. Keep soil moderately moist during germination.
Zinnias thrive in hot summer weather.
Plant in a sunny area with well drained rich, fertile soil. Water deeply by soaking soil and avoid spraying foliage. Pinch plants when young for denser foliage. Help ensure continual blooming by harvesting cut flowers and removing spent flowers.