The Polk County Sheriff's Office calls it one of the biggest marijuana busts in the county's history.

Deputies said they found a grow house with about 350 mature plants inside a Lakeland home.
   
It all started this weekend when neighbors said they heard a gunshot and saw a car speeding away.

Deputies said two suspects were attempting to rob the homeowners who found nearly a million dollars worth of high grade marijuana and a sophisticated growing operation.

"Certainly this marijuana was ready for harvesting, and we think the suspects knew that," said Polk County Sheriff Grady Judd. “We need to find the two suspects who are driving a dark-colored vehicle, possibly a Mercedes or sports vehicle."

This is the third grow house found this month, and the twentieth this year in Polk County.