Choose a sunny location with well-draining soil
Loosen the soil to a depth of about 12 to 18 inches
Remove rocks, weeds, and debris from the planting area
Mix in compost if the soil is poor
Plant seeds 1 to 2 inches deep
Space seeds 6 to 12 inches apart for smaller varieties
Space seeds 12 to 18 inches apart for larger varieties
Cover seeds with soil and gently firm it down
Water the area thoroughly after planting
Keep the soil consistently moist until seeds germinate
Thin seedlings if they are too crowded
Support tall varieties with stakes if needed
Protect young plants from birds and pests
Water regularly as the plants grow
Harvest seeds when the flower heads dry and turn brown