Not much, my
compost bins are underneath the tree. There is one 3 meter high Japanese Flowering Dagwood growing 1 meter away from the stem and Galium odoratum is crawling everywhere but doing poorly cause I'm trampling on it often. There is one flowering bush right next to it which I can't name yet. Without my compost bins it wouldn't inhibit growth of other stuff, I think.
Edit:
My nephew damaged the tree, visible on the left side of the trunk. Upper right side bad pruning from a neighbor is visible. I wasn't into plants on that time. Have to correct it someday.
It is a nice tree even though it was mistreated often in the past.
Seed capsules. They degrade in 1-2 year on bare soil, I crush them when they are dry and put them in the compost bin.