How to Dry Blueberries for Seed

Remove the blueberries from the blueberry plants when they are soft, deep blue and completely ripe.

Spread the blueberries out onto a baking sheet in a single layer and place the baking sheet into the freezer for one hour.

Remove the baking sheet from the freezer and pour the individually frozen berries into the plastic freezer bag.

Close the bag and write the contents and date on the bag with the permanent marker.

Leave the bag in the freezer for three months to stratify the seeds.

Remove the blueberries from the freezer and thaw them overnight in the refrigerator.

Place the blueberries into the blender and add 3/4 cup water. Process the blueberries and water on high for about 15 seconds and then leave the contents in the blender for five minutes to allow the seeds to settle to the bottom of the blender.

Pour the liquid out of the blender slowly to leave the seeds behind in the bottom of the blender. Add additional water to the blender and continue pouring off the pulp and liquid until only seeds remain in the bottom of the blender.

Pour the remaining liquid and the seeds through the metal strainer to separate the seeds completely.

Spread three layers of paper towels onto a large plate and spread the seeds out on the paper towel in a single layer.

Set the seeds aside until they dry completely -- about three to four days depending on humidity levels. Move the seeds around once or twice each day to separate the seeds and help them dry more quickly. The seeds are completely dry when they stay separate from each other on the paper towel.