Whether to deadhead sunflowers before or after frost depends on your goal. For seed saving, protect ripening heads from birds and squirrels with paper bags or pantyhose. Frost does not damage seeds; freeze-thaw cycles actually help crack hard shells, aiding spring germination.
Deadheading too early interrupts ripening. Let seeds mature on the stalk. Two methods:
Both work for growing or eating. The key is allowing full maturation on the plant.
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