I'm wondering why one would do so, unless one wanted a species or large numbers of pot luck plants. The cultivars all need to be vegetatively reproduced afaik.

But if you're happy with experimentation this is what the RHS says about sowing Bergenia.

Growing bergenias from seed

Bergenia seeds need light and a period of cold to help them germinate. They can be sown indoors or outside in spring.

How to sow indoors

• Put the seeds in a plastic bag containing a handful of moist soil. Seal the bag and place it in the fridge for two weeks.
• Then sow the seeds onto the surface of a seed tray filled with damp .seed compost. Don’t cover the seeds, as they need light to germinate. (In Brit speak Seed compost is a free draining mix formulated for germinating seed. )
• Place in good light at 21˚C (70˚F), water regularly and be patient, as germination may be slow
• Prick out the seedlings into individual pots once their first set of true leaves appears
• Keep frost free until large enough to plant out
• Plants will usually flower in their second year

How to grow bergenias / RHS Gardening

I once did & I really have very little experience growing any thing from seed. They were not hard at all to get started.

Jelitto sells seeds of bergenia omeiensis (which I badly want) so it is entirely feasible. I didn't order any since I was a bit suspicious of the photo...which looked like a smaller b.cordifolia, I didn't get the impression it was tricky.

Thank you all very much. I know Bergenia are easily available. Sometimes I just get a yearning to grow something from seed.