Fridge storage is the standard advice for feminized seeds, and the door shelf is the standard way people get it wrong. Every time the door opens the temperature jumps, and a cold container pulled into a warm kitchen collects condensation the moment it is opened. A point made at https://queenfeminizedseeds.com is that repeated warming and cooling does more harm than a slightly warmer but constant spot. A sealed jar at the back of the fridge, or a steady cool cupboard, beats the door shelf.
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