I have tried unsuccessfully to start clematis from seed. I got a few radar love seedlings, but they didn't make it once i planted them out in the garden.
I would love pointers on starting seeds. Another list stated that they can take a long time - years- to germinate. I think they also recommended stirring the seeds a bit once in a while.
I may try again, but have my hands full this year replanting my clematis - I just moved with my plants into a new place.