Germination in another container today! Dianthus caryophyllus sprouts greeted me this morning.
Took a close look at the container labeled 'Columbine Blue Barlowe' this morning, and now that the seedlings have unfurled a bit more, I'm pretty sure they're actually Dianthus of some kind, probably D.armeria (since I only sowed 3 kinds and that's the only other one that hasn't sprouted).