DRUGS police swooped on another cannabis factory in Newquay last Saturday – the fourth raid at the resort in six weeks.
Officers searched a property on Ennors Road using a warrant issued under the Misuse of Drugs Act, and found 64 cannabis plants.
More than 300 plants had also been discovered in three raids that took place from February 6.
Inspector Dave Meredith said on Monday that no one had been arrested in connection with the latest discovery.
He said: "This was a superb result and sends out a clear message that the cultivation and supply of controlled drugs will always be treated with prompt and robust action by the police.
"Cannabis cultivation factories such as this produce considerable financial return for their owners and are often linked to organised crime. We will continue to target persons and premises involved in the cultivation and supply of cannabis."
PCSOs from Newquay police station conducted house to house inquiries in the area and reassured residents.
People with information can contact the police on 101 or via Crime Stoppers, by calling 0800 555111.