To establish a tree in my climate I have to
water it with my irrigation system . On the slope of a sun scorched field gophers will be attracted to places where there is moisture and moisture is ONLY by the
roots of my trees. If the tree is in the ground the third year, then it's strong
enough for the
underground attack. By this time the galvanized wire cage will be half corroded. At the beginning I was not using planting cages and highest survivability was among pistachios. Gopher destroyed figs, apples, persimmons,
native blue elderberry, Risking a loss of a fruit tree that is costly, grows slowly is not a good option. I buy rolls of 0.5" wire mesh with square openings and make cylindrical cages 20cm diameter for smaller trees and 30cm for bigger ones. Before I was using 1"
chicken wire and it was just too big so gopher were still going to the roots.