I recently finished digging a 12" deep trench along EL JARDÍN's perimeter. It took several weeks of working a little each evening with a mattock, cutting through Colorado's dense clay soil. This is in preparation for the main line of my custom irrigation system. Next I'll lay 3/4" NSF-rated polyethylene tubing (poly pipe), rated for underground water service, and connect each raised bed and whiskey barrel into the system.