Our ungrown Seed Quilts last well over a year. The best way to store them is in a cool, dark place like your pantry. Cool temps and dry air are best for these seeds! Mainly just watch out for hot temperatures, humidity, and too much light exposure while storing. Even if Seed Quilts have been exposed to these scenarios or have passed the “sell by” date, your Seed Quilts are still safe to grow. Your Seed Quilt will still grow well, but the germination rate on the label may no longer be accurate!