BigBill said:Are they in full sun? It might be transplanting shock or transplant stress. Or the shock of being suddenly in full sun.
Also what has the temperature been like. Warm growing plants can develop reddish purple leaves with cool to cold temperatures.
Thanks for the quick response Bill. They are in a spot that gets morning and evening sun but not mid-day, which seemed like a good match for their needs. The temperature here has been wildly varying since they were planted, with nearly 90F on Saturday and only around 60F on Sunday. It has dipped a little below 50 at night so maybe that's it or part of it.
Transplant shock or stress is something that I didn't think of so thanks for mentioning that -- should help me and my wife to panic less. We've removed our entire front lawn and are replacing it with flowering plants, and so far things are looking really good except these guys who kind of got us worrying.