Welcome to the site, Linda...
And I agree, store seeds in an airtight container (storage/freezer bags; tight-sealing jars, etc) and keep from being exposed to excessive heat. I store mine in bags and/or jars and keep in the fridge or freezer for longest term storage. (I had sweet corn from 1994 that had near 100% germination two years ago that had been frozen.)
Have fun gardening!
Shoe
