When I sow Sinningia seed, I use a peat-perlite mix. I boil water in a microwave then pour the water over the mix before sowing the seed. The seed is surface-sown on the media after it has cooled. Seed pots are kept in a Ziploc bag until germination occurs. Typically I will check my seeds using a dissecting microscope before sowing. It is pretty easy to distinguish seeds with an embryo from those without. This gives me an idea whether or not to expect success. With wide crosses though, even if I see no embryos in the seed, I still sow the seeds. It is always nice to get one or two seedlings from a cross when you were expecting none. If I see no germination after six weeks or so, I discard the pot. Jon Fayetteville, Arkansas, USA