Hi. I am trying to grow exanthosoma elephant ears in large pots outside. Mine are about 3' tall in the pot. What happens with mine is that the stems keep breaking; I had 3 large stems growing one of my big ones the stem just gets bent over then that's it. It's dead. I read that it might not be getting enough sun so I moved the pot a couple of weeks ago to a morning sun spot where it gets about 4 hours of sun. Do you think it is missing a particular nutrient? I read to sprinkle a tablespoon or so of Epsom sally around the base of the plant. It's winter in SW Florida so I only water every other day.