I brought my lemon tree inside because we live in a climate that gets frost. Lots of leaves are falling off. Will this stop once it gets used to the indoors or am I to do something with it? Also, can I start another plant with a cutting or a lemon that has fallen off? I probably have 15 or so large lemons on the tree now and it is about 4 feet high in a 18 x 18 inch pot.