I've finished excavating the rectangular area between the fence and the raised garden. By that, I mean that all the dirt has been removed. This exposes the
underlying rock structure.
Notice that from the other angle there is clearly a round hole in the rock.
Let's look at that up close. This hole was put in for an ornamental cherry or peach tree that was part of the original landscaping. The tree died a couple years ago, so it lasted about 20 years. One problem might have been that it just did not have any place to grow to other than it's hole.
There are actually two holes -- there is another one closer to the fence that I put in a couple years ago for an olive tree. It didn't last thru the first winter.
The next step will be to remove this exposed later of rock. There are some probable seams between the rocks, but even so, the rocks themselves are much too large to be lifted out. I'll have to use the jackhammer to break them up into more manageable pieces of no more than a couple hundred pounds each.
Once the rock is removed, I will be able to put back the dirt, upgraded with as much organic material as I can get -- leaves and grass clippings. Then when we want to plant another tree, there should be a lot of space for it to expand into.