JD just a little warning about perennials they are very nice to have around in the garden. A word from a wise ol dahlia extremest…. Get em, grow em and luv em. They are so amazingly beautiful in any garden. There are small ping pong size blooms , medium sizes to dinner plate size. In any color of the rainbow in all shapes and textures. And they will knock your socks off. I get mine from Swan Island Dahlias online catalog. Order now before all the good one are taken.
You know what? I just recalled how much I loved rock gardens with waterfalls in childhood - Until I realized that I shouldn't have them around anywhere, specially not outside. Because that's going to become a paradise for snakes. And in my environment, every single snake is venomous... So that killed my childhood passion. But if your environment hasn't got such problems. Than I say go for it! Or better yet, make a living wall, with a rockery, and a waterfall - All indoors! And if pets are going to cause problems, then just put it behind glass. These below are some ideas, so just imagine the possibilities.