Habbitree’s seed pages give the same short storage routine.
Store in a cool, dry place.
Keep away from direct sunlight.
Close the lid tightly after every use, or reseal the pack.
Use a clean, dry spoon.
Whole seeds (chia, flax, roasted flax, pumpkin, sunflower and watermelon) have a best-before of 9 months from manufacturing. The Flax Seed Powder and Seed Mix Powder last 18 months, and their pages recommend refrigeration after opening. See the storage guide and shop Premium Seeds.