Caladiums are tropical plants which come in a variety of colors and combinations. They are native to the banks of the Amazon River in South America. The main colors are red, pink and white, and each different type of Caladium has its own unique and exciting color combination of two or more of the above colors. Caladiums provide an impressive showing indoors, their vibrant hues adding warmth to any home. They are at home in pots and can be placed outside when summer arrives. Caladiums don't like to be cold, preferring temperatures ranging from 60 to 85 degrees F.