Background:
Adjacent to our house is an empty lot that has been neglected: its owner lives in another country, and it has collected litter.
My parents said that they discussed purchasing the lot from the owner but couldn't agree on a price.
Months have passed since I planted lots of plants there, most of them are fruit bearing plants and vegetables.
Question:
I am thinking now what if the owner of the lot checks it someday and discovers that I've been using the lot to grow crops without her permission? Have I violated any laws? Or do I have rights to use a neglected lot in that fashion?
Edit: Added more information
The vacant lot has been abandoned since I was born, it's been more than decades!