This plant is about 10-12 years old, was half as high when purchased, ith many more leaves. Right now, it is about 19" inches high, with just the three branches as shown. As it grows and gets a new "umbrella" of leaves, a lower one drops off, leaves first, then small stem. Can someone tell me what this is and how I should be caring for it to encourage lush growth or is this how it is supposed to look? I water it every two weeks or so by simply setting it in a water bath up to the plant base, soaking for 15 minutes. Thank you in advance.