Hardy geranium, candytuft, convolvulus, campanula. Trying to think of shorter ones without a solid mat root system.

Iris_gal, Thanks for the info. I'm sorry I didn't see this sooner. I had clicked to be notified of replies by email but I guess it didn't work!

I have several candytufts and a hardy geranium I need to move so that will work great. Thanks!