I've never grown them indoors. My outdoor caladiums sense autumn with the declining light or temps, and leaves get smaller.
They can be slow to get going as well. Potting them in spring outdoors, they can takes weeks and weeks to show anything. Warming them should speed it up.
But having grown them outside, I'm not interested in trying them indoors. I'd rather get a pink/red Aglaonema, easier to deal with.
