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Refrigerators are often too damp for long-term seed storage. Seeds require specific moisture levels to remain viable, and the typical humidity levels inside a refrigerator can lead to condensation, which increases the moisture content around the seeds. This extra moisture can encourage mold growth and seed deterioration, rendering seeds less viable or completely unviable over time.

In contrast, ideal seed storage conditions usually involve low temperatures and low humidity to preserve seed dormancy and longevity. Therefore, while a refrigerator may provide a cool environment, the associated humidity typically makes it unsuitable for preserving seeds over long periods. Most experts recommend using a cool, dry location such as a freezer with proper moisture control for optimal long-term seed preservation.