I live in florida and I got this chinese elm in the summer, and it is now the fall. I have noticed that about a from a couple weeks after I purchased it to now that the leaves are turning yellow and brown, and some of the others brown around the edges. These leaves fall off. I am keeping it indoors next to a window, and I want to know what is going on? I am loosing lots of leaves on it everyday, and I do not want it to die. What is happening and wat should I do?