Robinia hispida AKA Robinia fertilis, Rose acacia, Arnots Bristly locust

This 3-5 foot tall Black Locust relative reportedly fixes nitrogen, is resistant to deer browsing and has pretty pink flowers, and spreads aggresively by root suckers. F. W. Schumacher has seed availble: https://www.treeshrubseeds.com/specieslist?id=380
Here's a 2-pge descrioption: plants.usda.gov/factsheet/pdf/fs_rohif8.pdf
Has anyone used this as a short-lived nurse crop for planted trees? Has anyone done business with F. W. Schumacher?
I imagine this would fix nitrogen, then get shaded out by taller trees when the tree canopy closed.
It's supposed to only cast light shade itself, and to be winterkilled in zone 4 above the snowline. It's native in Tenn. and NC.

think I got my seed of this species from lawyer nursery, but have gotten other seed from schumacher and has been good. I like these plants, they don't take many years to start flowering, and sucker, so create many that I can plant elsewhere.
Probably resistant to deer browsing once established and suckering, but some transplants I planted this spring were getting eaten a lot by deer. Deer like them, just that they are tough plants that can survive attack.

I came across another thread on this: https://permies.com/forums/posts/preList/35866/327341