So I tried to mimic the Litho City Builder and extend it to AR Gardens concept. Here is a video of what I tried.
As this project was a part of a Hackathon you can also find the code in this repository. The AR Farming module contains the Augmented Gardens Unity Project. The other modules are part of the core application developed in Flutter. We changed the name of the project from AR Farming to Augmented Gardens later on in a rush so please don’t get confused due to that.