Patty, why did you get cherimoya seeds from the Netherlands rather than California? You can get 5 pounds of fruit with lots of seeds for $18 plus shipping of something like $9.30 at
cherimoya.com (you may need to have an account to access that page). Or order some white sapote while you're at it and have them shipped in a large flat rate box and plant those seeds also!
How log does it usually take for passionfruit seeds to germinate? I've had only 4 out of 20 germinate after about 3-4 weeks but I don't think they were very fresh.