Planting Palo Verde in Bad Soil
Just removed an extensive Saltillo tile patio with 4"-5" of concrete base and all was hauled away. Will replace with smaller paver patio and the remainder will essentially be 3/4" rock. I wanted to plant a 24" boxed Desert Museum palo verde tree in the rock area and I started to dig the necessary large hole for the tree. WOW! The first 4"-5" of dirt is as hard as concrete, but I have made some progress, although very slowly. I dig and then fill the hole with water in the hope of softening the dirt and have noticed that the water takes nearly a day to dissipate and the upper 4"-5" is still hard, but the bottom and sides have loosened-up. What soil amendments should I use for the back-fill when planting the tree? Should I use anything in the hole prior to planting the tree that will break-up the caliche like soil? Do you think the tree will make it? Thanks.