I don't know if that picture was supposed to illustrate what you should or shouldn't plant, I'd guess though that musseanda and plumbago would both do well in your area. I just got a white musseanda like the one in the picture and it is kind of straggly too. I think they usually look a bit bare at the bottom. I love the blooms though, and hope that I can hide the bare spots and see the blooms.
