Thanks, guys. I had good germination rates of all the seeds, with the possible exception of the verbenas. Only about half of them germinated, and they just sat there for several weeks after sprouting their first two tiny cotyledon leaves, without growing more than 1/4 inch. But I noticed yesterday that most of them have finally put out two additional "real" leaves, so I'm heartened by that. I love verbena spilling over stone walls and cascading down slopes, and am really hoping these take. The rudbeckia also took forever to start growing after germinating, but they're doing well now.
Good luck with those pots, Sue!