I take care of a garden in White Rock BC which is near Vancouver. This site is relatively new to me so I don't have much historical knowledge. I want to know if there is any hope of salvaging a few Cercidiphyllum japonicum trees and what might be the cause. There are several other specimens very close by that are healthy. The trees of concern have wilted leaves at the top and the bark is flaking. I have noticed at the base, a long time ago there were cuts made to remove separate trunks. (see photos). The trunk at the base looks pretty deformed where the tree tried to seal over the wound. I think this may be the problem (Water transport?) I tried to take the best photos I could but I'm not sure how well it shows. It looks worse in person than I was able to get in photos. I took some leaves from the healthy tree(right) and put them beside the bad(left) for comparison. Thanks for any help. I'd really like to try and keep these but am not that optimistic.