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The sunflower has one head.The sunflower has one head. The flower generally lasts a while. Generally, the bloom lasts a few weeks. When it dies down, you can simply snip the head off the plant if you wish. Many people like to harvest the sunflower seeds. The heads will be ready to harvest when the back of the head has turned brown. After you snip the head, rub the seeds out by hand.

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