Three men were arrested after police carried out a drugs warrant at a caravan site in Chesterfield.
The warrant was executed at Corbriggs Caravan Site, in Mansfield Road.
A number of suspected cannabis plants, growing equipment and cash were found during the searches on August 16.
Three men, aged 23, 41 and 45, were later arrested in connection with the warrants, on suspicion of producing cannabis with intent to supply.
They have all been bailed pending further inquiries.