Today while cleaning out my utility building I found an envelope marked Passion Flower. Indeed it contained several seeds. I don't remember where they came from or when. I figure thay have been in there at least 6 years. I have them stratifying in the refrigerator in moist potting soil for a couple of weeks or so. Any one want to place bets on the chances of germination? I would guess the chances are slim but I had to try.