Giant Sunflowers - Knowledgebase Question

Anchorage, Al
Question by cictdc
October 2, 2009
I planted about 30 sunflowers this spring. Not all have bloomed. what do I do with them once it freezes? Do I cut them down?

Answer from NGA
October 2, 2009


I'm afraid the first frost will kill the plants so if you want to harvest the seeds you'll want to cut the flowerheads off the plants before the first frost. They can dry upside down in a garage or basement. The seeds will be fully developed only in those flowerheads where the petals have begun to turn color and fall from the heads. If the centers of the flowers are still tight, they may not have had time to produce seeds. I hope you're able to collect some seeds for either replanting next spring or for roasting!

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