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Seed Viability: One-Year-Old Cosmos and Zinnia Seeds Are Fine

One-year-old cosmos and zinnia seeds stored in reasonable conditions (not too hot/cold) should germinate at 80%+. Test by rolling in damp paper towel, sealing in a plastic bag, and placing atop the refrigerator for a week. (A 1964 herb packet I tested had 0% germination after 42 years—but one year is trivial.)

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