DRUGS factories that would have cultivated £275,000 worth of cannabis have been seized in Crosby and Waterloo.
More than 570 plants have been uncovered at two cannabis farms in Brownmoor Lane and Rockland Road.
Police carried out separate warrants at two addresses in one day and discovered the plants along with growing paraphernalia.
At a raid on a house in Brownmoor
Lane on Thursday, May 14, 206 plants were found, which would have cultivated drugs with a street value of £100,000 within a year.
A woman and three men have been charged with conspiracy to produce cannabis and appeared at South Sefton Magistrates Court on Saturday.
Sun Li, 33 and Yun Can Lin, 32, both of New Kiln Road in Colchester have been charged along with Qiqi Lin, 34, and Wen Xang Lin, 31, both of no fixed abode.
An address was also raided in Rockland Road after the landlord of the rented house made the discovery during a visit and called the police.
Officers found 370 plants, which would have produced drugs with a street value of £175,000 over a year.
Enquiries are ongoing and no arrests have been made.
By Lyndsay Young