Eranthis hyemalis / winter aconite: germination

Over two years ago, I bought some winter aconite corms. It seems that these corms can be difficult, and they took a while to establish. Thus, last year I carefully collected the seeds with a view to growing more from scratch.

Over two weeks ago, I sowed these seeds indoors in good compost in a propagator, but none have germinated (other seeds there have germinated.)

Now, looking on the web, it seems that germination of these seeds can be difficult, and that they may need a particular temperature regime.

One suggestion I found was to just scatter the seeds directly from the seed-heads and leave them to it. But my problem here is that I won’t know which seedlings are aconites, and which are weeds.
Thus, this year I plan to scatter the seeds onto compost in trays and leave them in the garden to get on with it.

Does anyone know whether these would germinate before next spring?

Does anyone know how I can persuade last year’s seed to germinate?

Has anyone got a better idea?

[I’d like to get more plants before next spring!]

NOTE: Rather confusingly the RHS website says:
Propagate by seed, sown in pots in a cold frame in late spring or separate tubers in late spring after flowering. Dry tubers may not establish well.
https://www.rhs.org.uk/Plants/6540/i-Eranthis-hyemalis-i/Details