Container gardening is soo much fun....the possibilities are endless...the one thing I would say is look for dwarf varities and try to use plants that don't spread like wildfire---and you always want to include plants with height, color, and texture....one of my favorite combinations is a plant that spreads and cascades down the pot-something with height and hopefully color or texture(examples-varigated sweetflags(they come in standard and dwarf),corkscrew, taro, dwarf papyrus or king tut papyrus, bluebells, and ect) and then something that blooms...also anything that holds water or can be made to hold water can be used as a container garden....tons of really neat possibilities...the one that gets the most notice at my house are the old washer tub I lined with plastic, sprayed foam on the outside of it and spraypainted...I also have an old metal water cooler, an old bathroom sink that is buried in the ground and looks like a tiny water garden, lined army ammo boxes and an old mini-bathtub out of a travel trailer....I have found container gardens do really well with morning sun and afternoon shade....
Lawanna