I have had my elephant ears for 3 years. The first year they grew really big was really big leaves on it. Since that year the last two years have went downhill my elephant ears are not growing like they're supposed to be. I have plenty of water and plenty of fertilizer just like I did the first year. They are the same plants that I've had the first year I just cut them back for the winter. Could someone tell me what I'm doing wrong?