These seeds can be stored safely for 3 years at 65 degrees temperature and much longer at lower temperatures. The critical factors for storing seeds are temperature and moisture content. Storage temperature should be a cool area of your home, these seeds may even be stored in your refrigerator. People sometimes ask if freezing will hurt these seeds, the answer is no. The National Seed Laboratory freezes their long term storage seeds.
Nature freezes seeds during their dormant winter period with no adverse effects.
We recommend you purchase Seed to Seed, by Susan Ashworth . This book supplies great information about seed harvesting. All rights reserved.