Central Hunter Police have found more than 300 Cannabis plants at a house in Thornton.
It's being described by officers as one of the biggest hydroponic set-ups they've ever seen, with every room in the Acer Terrace house being used.
Police will return to the house today to continue dismantling the operation which they believe could be linked to the drug house uncovered at Wallsend earlier this week.
Detectives are believed to be close to making arrests over the find.
