Absolutely, Chris. Mulch keeps the moisture in the soil, keeps down weeds and also keeps the soil cooler. All those things will help your Caladiums both to grow better and to last longer.
I like Florimulch if you can get it. It's a wood chip mulch made from an invasive tree - the melaleuca tree which is also the source of tea tree oil. Thus the mulch is aromatic, and doesn't attract bugs as much as other mulches. Usually it's available at Lowe's or any good nursery. Buying this mulch also benefits the environment because you're paying the company to cut down invasive trees. A win-win!
