I am thinking of planting Mimosa, fruitless mulberry, and if I could Hackberry on purpose.

We built a house in Grayson County and moved in about 3 year ago. Our piece of property is on a hill and heavy rains are a problem. During construction when they built our building pad they scraped a bunch of soil up hill and brought it down for fill. This made an already unstable hill, more bader.

This past Winter into this Spring I finally got some Rye to stay on the hill long enough to actually grow, so I have a little bit of something holding it in place. I am honestly at my wits end with this and I want/need something to happen fast. That's why I am contemplating planting some junk trees just to get something established. Hold the hill in place, start producing some leaf litter in the Fall, give the birds a place to hang out. Where I am going to plant will be free of any driveways, sidewalks, house, etc.... They can do what they want root wise, I don't care, they can fall down in a storm one day, I don't care..... I just need something going sooner rather than later and real trees are too slow.

I have soil pH like 8.1, Great big alka seltzer. Almost no Nitrogen and no Phosphorus.

In my experience , mulberry is not much good at erosion control; it just goes with the flow. Cottonwoods have done a great job of holding onto the river bank behind our barn, boxelders do pretty well too. Both are fast growing, I don't, however, know how they will do in your soil - ours is slightly acid.