J
jonkanoo
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Your friend the freezer
A benevolent tool in our trade is the refrigerator and freezer. The fridge is extremely useful in extending the longevity of seed and pollen. The trick to successful freezing is to freeze deep (-10 to -40°F/-20 to -35°C) and then keep the seed undisturbed. Hard frozen objects are very fragile. The slightest shock may shatter crucial, delicate cell structures within the seed. Double wrap the seed in paper; little manilla envelopes work great.
I like to do small amounts, in one-time-use packets, to keep waste to a minimum. Then place the wrap into a plastic freezer bag, then place the freezer bag into a plastic tub or tupperware container. Now the seed is ready for the deep-freeze. In the fridge, storing seed in airtight, brown glass jars with a little rice or other non-toxic desiccant seems to work best.