Choose a sunny location with at least 6 to 8 hours of direct sunlight
Use well-draining soil
Loosen the soil to a depth of 12 to 18 inches
Mix in compost if needed
Plant sunflower seeds 1 to 2 inches deep
Space seeds 6 to 12 inches apart for smaller varieties
Space seeds 12 to 24 inches apart for larger varieties
Water the soil after planting
Keep the soil moist until seeds germinate
Thin seedlings if they are too crowded
Water regularly, especially during dry periods
Avoid overwatering
Support tall varieties with stakes if needed
Remove weeds around the plants
Watch for pests and diseases
Harvest seeds when the back of the flower head turns brown and the seeds are mature