I been studying desert trees because The Arizona Desert Botanical Garden is going to have their spring sale on March 18 and 19th, and I want to know what I should get to add to the backyard.
The Velvet Mesquite is the best type of mesquite tree to plant.
Pick the bean (or pod) from June through early August. There is a tight window because you want the bean to be dry (it should come off the tree easily) but before the monsoons hit.
Milling is a process to pulverize the bean into a protein rick powder similar to flour. The husks is where the flavor is and the protein is in the hard seed. Milling is done in fall. It takes that long for the moisture to get out of the pods. Store in a manner that the Bruchid beetles inside the pods can hatch and escape. The Bruchid beetle is harmless.
Desert Harvesters is a great site about harvesting food from Desert trees.