Elephant ears are big and leafy and come from the Caladium family. They originated in sub-tropical and tropical areas but can be commonly found in temperate summer gardens. They grow 3 to 5 feet tall and start out as a tuberous, bulb-like structure. They can be particularly invasive and spread via underground rhizomes. If the time ever comes that you want to get rid of your elephant ears, rest assured that they are easy to remove. It can be done by killing the above top growth and then digging out the tuberous bulb.
Spray the elephant ear foliage with a non-selective herbicide containing glyphosate. Spray with a hose-end sprayer over all the foliage.
Wait for the elephant ear foliage to die back to the ground. You want the herbicide to work its way into the root system before removing the plant. The foliage should take between 2 and 7 days to completely die.
Cut off all the foliage once it dies back to the ground. Use a large knife or a pruning shears to cut the foliage.
Dig up the tuberous bulb. It will be located directly below the main stem and will vary in size. Discard in the trash.