The existing garden has a few shitey little shrubs and what looks like some rubbish clay soil.
A couple of small shrubs will be sacrificed & the shitey soils amended with some good well rotten leaves lying around the car park.
The mandarin tree will go in and hopefully start producing some nice fruit next winter in what is otherwise a large carpark.
Make a barren car park a productive food producing area.
If I can find a place to do so, I could post some before & after pictures on the web.