Propagation: lewisia from seed, 1 by hortensia

hortensia wrote:
Anyone have any words of wisdom on growing lewisia from seed. I woke up in the middle of the night absolutely convinced that it was lewisia that I needed to plant in the blank areas around my new patio. (I hate that, I do it all the tme) anyway, seed is the answer; because the plants are hugely expensive; leading me to suspect some difficulty.

I grow a lot of things from seed; have grown rhodos from seed; so a little difficulty holds no terrors,but I would welcome advice from anyone who has done this already -- no sense reinventing the wheel.