I live in eastern PA near Trenton and have a kousa dogwood that I assume is ~20 yr old. For the last two years, many of the leaves are half 'closed' and pointing toward the ground. This year we also had far fewer flowers than other neighborhood kousas had. The part that gets afternoon light look good: flat wide leaves and facing up. The tree gets light by noon and then is shaded largely by a maple by around 3. Considering the quantity of rain we have recently received and that a gutter empties near it, it can't be dry. I apply no chemicals in my yard and have fed it only with compost. There is a wide bed of vinca growing all around it. Any ideas why so much of the tree looks poor? Does it need more light? Is the vinca hurting? Anything I can do?