Hi Aaron, thanks for responding!
I tried to upload a photo to my original post, I guess it didn't work. I added one to this, hopefully it works this way!
We live in Albuquerque, NM in the river valley, zone 7b (but shifting towards zone 8 with the weather changes).
I am wanting to plant one or two purple robe locust trees in between a row of pine trees. There is about 30 feet in between the pine trees, I am hoping to fit 2 locust trees in that space but would that be a bit too crowded for them?
Thanks!