I have got a sort of tropical type jungle garden, it takes quite a while to grow anything to a reasonable height, I have three mahonia shrubs which over ten years are now over ten feet tall, look very tropical, beautiful yellow flowers followed by purple berries in clusters, but very prickly foliage, evergreen. I have fatsias, palms, a tree fern, grow tree lilies in pots, smaller canna lilies also in pots to fill in spaces, my pride and joy are two daturas also in pots, also known as angel trumpets, the scent of them in the evening is heady, I often buy plants that aren’t necessarily tropical but just a bit edgy unusual, good luck with your garden, I love mine