Yes. All seed banks freeze seeds that are intended for long-term storage, and you can do the same at home. The key is to start with thoroughly dried seeds (if you saved them from your own plants) and store them in airtight, freeze-proof containers to reduce the risk of seeds absorbing moisture. Keep the seeds in a reliable freezer that maintains consistent temperatures and isn't opened often. When it's time to plant, thaw the frozen seeds overnight at room temperature before planting them.