What type of rock is it? Looks like petrified wood.
Nice tryout.
The small stone on the top of the right part, Ever tried to remove it?
I just found sad to cover that Beautiful frodo stones that sat on the front with soil and plants. You could use some volcano rocks (in French it's called pouzzolane) to support the bigger stones and avoid good soil circulation.
Anyway I'm sure that once
Planted it will look nice, What's your plan about plantation?