Clematis seedling re-flowering

I have 2 different large flowered Clematis reflowering at present, both from seed, but a long while ago.

I do love a challenge and growing some things from seed is certainly that. The benefits are good though.

When I grew Clematis from seed, I just put seed in a pot and left them outside to cold stratify, seems to work.

It is always a pleasure (for me) to see plants re-bloom.