Yes, it is possible to store Plumeria pollen for future use in hand pollination. To do this, collect fresh pollen from a Plumeria flower by gently tapping the anthers and collecting the yellow pollen on a paper towel or small container. Allow the pollen to dry for a few hours, then transfer it to an airtight container. Stored in a cool, dry place, Plumeria pollen can remain viable for a few weeks to several months. Proper storage ensures the pollen’s integrity and viability when used for hand pollination at a later time.