A potential £30,000 of cannabis was uncovered during one police drugs raid operation in Kirkby.
Sutton police discovered a total of 28 plants being grown at addresses on Gladstone Street, and Park Street.
Once the plants mature - police say they are worth around £1,000 each.
Sutton sergeant Martin Severn said the operation was a success but relies on the public for information about production.
“Cannabis production is a common problem we have in Ashfield, and if we had the resources it is something we could pursue full time.”
He said the police rely largely on information provided by the public.
“It is vital that if neighbours can smell cannabis, or think neighbours might be cultivating the plants, we need to know to be able to put a stop to it,” he added.
Officers estimate people in Sutton and Kirkby alone are making thousands and thousands of pounds a year in profit.
“It’s not just the illegal money making, but it’s also dangerous.
“Many people who cultivate cannabis bypass the electricity to cover the sheer amount of electricity that is needed.
“This leads to poor electrics, and in some cases fires.”
A house’s roof fully collapsed in Kirkby, and the home was left structurally unstable after a fire due to poor cannabis production electric at the end of last year.
He added: “It is unsafe for residents as well as neighbours so we need people to give us the information we need to act on such criminal activity.”
Anyone with information about suspicions about cannabis production should contact police on the non-emergency number 101, alternatively contact Crimestoppers anonymously on 0800 555 111.