This volunteer mulberry gets full sun, and will for the next 10-15 years, after which it will be shaded by the pines to the south east of it. I think I want a group of mulberries here, trained to be climbing trees for kids.
Not visible in this image, a few feet behind is an upright Wisteria, holding itself upright. Will leave and pay attention to for now. Other wisteria popping up in here need to go, though, along with any winter creeper or bush honeysuckle.