Salpiglossis are one of the annuals I start every year from seeds. I've had really good luck sprinkling the seeds on top of moist seed starting soilless mix. I spray a light mist of water on the seeds and put them under a tray with a dome under lights. If I need to water them before they sprout I water them from the bottom. I don't let them dry out but don't get them to wet either. The kew blue ones are my favorite and if I have them in an area where there aren't any others close, they mostly come true from seed.
