If dried and stored properly it can remain viable for several years. I'm basing this bit on research, not experience though.

When drying for long term storage (more than a few months) use a glass container. Plastic can breath / leak. Harvest, dry, and refrigerate within a few hours. Place in refrigerator for a few days with desiccant to ensure that any residual moisture is removed. Then move to the freezer. So long as the pollen does not rehydrate it will remain viable. Any moisture will explode the pollen cells in the freezer. When ready to use, remove from freezer and use within a few hours. Preferably right away.

The problem with shipping pollen around is that it quickly degrades at room temperature. At room temperature pollen remains viable for 24 - 48 hours maximum.
bigsby Reviewed by bigsby on . pollen sources? Is there anywhere you can buy individual strains of cannibis pollen? I think it would be a cool way to make some interesting blends if you had a mother plant you really liked and think a strain sounds appealing for a mix :) you could paint a little sour diesel pollen on a ww bud, and keep clones of the strains you end up with in the next gen that exhibit the characteristics you desired :) Rating: 5