also what's a good source for native mesquite, and hints for planting
See my reponse to your ocotillo post. Sarah at Desertland has native mesquite.
Another great nursery in El Paso: is East Side Discount Nursery. East on I-10 to Lee Trevino, turn right, going south a few blocks and the nusery will be on your right where Lee Trevino ends(I forget the street name). if you like palms, they have large mature specimens.