I know someone not to long ago asked about saving croton pollen. ( I couldn't find the thread so I'm starting a new one). Well never having had any luck with it I didn't respond. Until now that is. Last week I had a plant I wanted to use as a pollinator which was full of pollen and nothing to cross it to. I found a tiger eye about to open as a female so I picked a handful of the male flowers put them on a piece of folded printer paper, there was pollen falling out everywhere, stuck that in a plastic bag and immediately put it in the freezer. Today the tiger eye was open so I removed the bag from the freezer, opened it and to my surprise there was still pollen grains in the folds of the paper. The flowers didn't release any more pollen but I was able to pollinate the tiger eye. Don't know if the pollen was any good or not and only time will tell. I'll let you know.