Depends on the variety. Standard sunflowers produce one - or at the most - two flower heads, and then they die. But, there are hundreds of hybrids that have been developed to produce multiple flower heads and last longer. Most seed catalogs will have a wide variety. Many nurseries will have seed stands with ample sunflower varieties.
Avoid buying sunflower plants. They are expensive and don't transplant very well. If you find a sunflower variety that you really like, plant it this year and let the flowers go completely to seed. Allow the flower heads to dry out in the sun (keep protected from birds), then cut the head off and keep the seeds for next season. They may not look exactly like the variety you had the year before, but who cares? The seed is free!
How many heads on a sun flower plant can be produced?
To get the biggest and best seeds you want to limit the plant to one giant one by cutting off the side flowers.
If you leave any other flowers on there you will get more small flowers but smaller total seed production.
Reply:Be sure to protect the seeds from birds with bird netting. They ate all of mine!
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