I think at some point i made a request to place a bush here but the citizen in question was interrupted or so. Now I have this ghost object close to my building and there is no way to remove it. I also tried to find the berry bush that shopuld have been placed there, but I cant locate it.
Select the ghost object and open the stonehearth console and type destroy and press enter.
You can open the console by pressing Ctrl + C at the same time.