Jennifer, thanks for the mention of Raspberry Rum Alternanthera. Looked that one up. I love the foliage on a few of them. I am going to try and add some this season. Strobilantes is one of my favs.
Bitbit, you have soooo many options. You can't go wrong.
I agree with Danita on the Colocasias. This would draw the eye in to the rest of the garden. Don't forget to share some pics of the end result.
