Answer: A friend of mine grows sunflowers in his market garden. He lets the birds eat a few, and they scatter enough seeds that he has "volunteer" sunflowers everywhere! He also saves seeds and has planted them with great success. Save your seeds in a cool, dark, dry place or in the refridgerator.
As long as your sunflowers are not hybrids (hybrid seeds do not develop true to the parent plant), they should do fine!
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