Anna, do you know there are SUN tolerant caladiums? I found they do better if not subjected to afternoon sun, but I've put them in windowbox planters where they got bright sun from dawn to dusk, and they looked great -- they were just a bit smaller than usual.
Bill has the sun tolerant varieties noted on his website here
http://www.caladiumbulbs4less....
No need to miss out on these beauties! And whatever other ones you get, snag some 'Gingerland'. They have such a lacy, dappled pattern.. they pair well with every other color.