Gotta Garden / Lots of good planting schemes for containers and gardens here. Love the black-leaved Dahlia with purple Calibrachoa (they look like mini petunias), chartreuse sweet potato vine, alternanthera, pentas and bacopa.
I love colorful foliage plants. They also are perennials and would come up here after year. I think this is a beautiful idea to plant these hosta type plants under a tree with all their different colors