I ordered 'black trumpet from Thompson & Morgan and S. grandiflora from T's flower & things. Sprinkled seeds on top of moist planting medium and covered lightly with vermiculite. That was on Jan. 26 and on Feb. 8, found germination of the 'black trumpet'. Today 2 seedlings of grandiflora. Last year tried with seeds from swap but they didn't germinate - hopefully this year these will get big enough to bloom!
I very much want these in my garden --- they are just lovely.