If you are not going to use the seeds immediately, spread them thinly on screens in a warm, well-ventilated area that is not in the sun. DO NOT dry seeds in an oven. If you use a food dehydrator, turn off most of the heating elements, and don't let the temperature exceed 100° F. Turn the seeds over every other day to avoid damage from insects, fungi, or moisture. Berry seeds are sufficiently dry if, when you try to crush them between your fingernails they feel totally hard.

You can separate dried seeds from chaff or debris by using different-sized screens, but don't spend too much time trying to obtain pure seeds a little debris is usually okay. However, be sure to throw out broken, shriveled, moldy, and bug-eaten seeds.

Place thoroughly dried seeds in a labeled, airtight container, and store it in the coolest place in the refrigerator or in a cool, dry place. DON'T expose the seeds to freezing temperatures (the ideal storage temperature is 34°-38° F).