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A bit more on saving seed from You Grow Girl site.

Storing Seeds
The best way to store seeds is to package them in paper envelopes or bags since they allow for good air circulation and don't sweat. However, any container will do, keeping in mind that humidity and lack of air circulation will cause mold, disease and prompt seeds to germinate prematurely. Film canisters for one aren't recommended as the plastic promotes humidity and stagnant air. The temperature should be cool to make longer storage possible-refrigerator storage will work if you can't find a naturally cool place. Be sure to write the date, name of plant and any growing instructions you are aware of on the envelope or package. This will come in handy when using the seeds a year or more later, and will be appreciated if you give the seeds to someone else. It's worth it (but not necessary) to put a bit of extra effort into the packaging if the seeds are to be given away. Use specialty papers for the envelopes or create fancy labels to mark them. Some envelope and label templates are provided here for you to print out on any paper (or sticker paper for labels that is compatible with your printer type).

Store seeds carefully by placing envelopes inside large glass jars with a bag of silica or powdered milk. These products absorb excess moisture. Reuse the tiny bags of silica gel that come inside new shoes--dry them for a few minutes at a very low temperature in your oven. Alternatively, make a tiny package of powdered milk by pouring a pile into the center of a piece of breathable fabric or tissue paper. Pull the corners together and close it up with a piece of string or elastic to create a sachet. The best jars for storage are wide mouth mason jars used for canning. They have the proper airtight seal that is essential for long term storage. If you store the jars in a cool, dark place the seeds should last from a year to a few years, depending on the type.