Katsura trees are known for their spectacular fall foliage and carmel like scent. Mine is not doing that. Mine is ugly, with leaves just turning brown and falling off. And no smell. There are about 6 katsura planted on my street. All the trees on the other side (east) look pretty. The ones on the west are like mine. What is wrong? Have some theories but need help putting puzzle together. BTW, the prettiest tree on my street gets the least attention. Need more info on this tree, I guess. Help!