Watering a ficus grown in Phoenix, AZ, I've recently had irrigation put in that has changed the way I water the tree. Previously I just used a hose and ran it at lower volume output for an undetermined amount of time, filling up a circular berm we had formed around said tree.
With the irrigation, I have no idea what I should be doing. I found a document made by Arizona Municipal that recommends 24-36 inches of depth, every 7-10 days, but don't know how to measure that depth.
It's an Orbit timer, and I currently have it set to 30 minutes a day. The tree is about five inches in diameter.
Thanks in advance!