i have a or i think it is a rubber tree it belonged to my sister that passaway last aug. but it is growing, but the plant only has leaves at the top the leaves are very green and the leaves keep falling off , the stocks are green are in great shap but i dont understand about the tree itself, should i prun the stocks back to see if the leaves will come back like they should or what PLEASE HELP I AM IN VERY MUCH NEED OF YOUR HELP . HENRIETTA MARSHALL