Caladium Culture

This is not likely an infectious disease but a disorder caused by environmental conditions. It may be that this particular caladium variety does not do well in afternoon sun. There are some varieties that will grow in full sun all day, but many of them are shade loving. In addition, full sun will cause more water loss from the leaves and once caladium leaves wilt, they do not recover well, if at all. Just in case, we want to mention that if fertilizer comes in contact with caladium leaves it will usually cause spotting damage (even if its mixed with water). If the leaves are crispy its too much sun, and if the leaves are soft and “water soaked” its too much water being retained in the soil. We’ve included a link about growing caladiums for your reference as you can probably narrow down the possible cause in person better than we can from a photo
http://gardeningsolutions.ifas.ufl.edu/giam/plants_and_grasses/flowering_plants/caladiums.html