JSN got it, and I'll add to his info that if you store pollen, it must be very DRY to remain active. I store it in a paper envelope with a few grains of rice until it is ready for use. The envelope should then be sealed in a ziploc baggie. IF you keep it in the freezer, youshould know that you must use it immediately after thawing, and also that you should let it come to room temperature before opening, to avoid condensation, which will moisten and ruin the pollen.