Police have uncovered an enormous hydroponic cannabis crop on a property in Bargo, estimated to be worth 13 million dollars.

4,324 cannabis plants have been seized, ranging from seedlings to mature plants.

Police say they were being cultivated in 16 large greenhouses and work-site offices.

There was no one at the property when police arrived and inquiries are continuing to identify those responsible.

Anyone with information about this incident is being urged to contact Crime Stoppers on 1800 333 000.