Rosemary Topiary - - Rosemary is the easiest to grow and it grows quickly, so if you're looking to add topiaries to your garden or porch, this is the best plant to choose! It's also easy to propagate, so in a short time you can have a lot of plants!
Deck tree - This golden maple makes a beautiful potted tree in this tall terra cotta. Maybe a Princeton Gold Maple "Acer platanoides" or a Golden Full Moon Maple "Acer shirasawanum 'Aureum'" (small, shade)
Good idea for multiple reasons: equisetum (horsetail, snake grass, puzzlegrass) (grow zone grows so quickly and make even the newest newbie of a gardener feel accomplished and happy. equisetum can get out invasive and a container will control it.