Caladium Nutrition
In order to get continual growth after sprouting, caladiums should be fertilized. In sandy regions of the country, such as much of Florida, a good slow release complete fertilizer (Osmocote, Nutricote or other slow release) seems to work best.
Fertilization:
Although many growers do not fertilize, we recommend:
50-100 PPM N (constant) of 6-6-6 or 20-20-20 or
300 PPM N (weekly) with fresh water in between