Plant sunflowers in full sun
Use well-draining soil
Water deeply when the top inch of soil is dry
Avoid overwatering
Space plants properly for airflow
Support tall varieties with stakes if needed
Remove weeds around the base
Add mulch to retain moisture
Fertilize lightly if soil is poor
Deadhead spent blooms if you want more flowers
Protect young plants from pests and birds
Harvest seeds when flower heads dry out
Cut back plants after flowering if desired