Your experiments with growing from seed have inspired us. We have just received our first order of hybrid mix seeds from a fellow in England and proceeded to sow them. We used a flat filled partway with vermiculite and topped off with a fast draining seeding mix. It's quite chilly here in the evenings (low 50s) so we'll be keeping these in a sunny window until things warm up...or until next spring...whichever comes first.
Looking forward to meeting the mystery Semps that might come from this project!