Well, I have an odd situation with the trees that I have kept in pots in my garage this past winter. The Red Clapp's Favorite actually has a few blossoms opening up now. Outside it's 20 degrees. All the Bradford pears bloomed and then were frozen, but I do have a few of the Red Clapp's blossoms I could get pollen from. Is it possible to keep the pollen fresh and usable for a few weeks so I could pollinate my large pear tree a little once it blooms?