My Jade plant seems to be healthy, with shiny and juicy leaves. But the problem is that the leaves tend to grow downward. The closer to the bottom, the leaves are bigger, thicker and more downwarding. The top leaves are thin and flat, which are beautiful. I don't know why it is like that. Is it because the plant is overfertilized and the bottom leaves grow to be too big and heavy and can not hold themselves? Thanks for your help.