A mother and son involved with several properties that were bought and turned into cannabis farms have today been jailed for a total of over twelve years.
Police discovered plants at four addresses which it was thought could have yeilded crops worth more than three hundred and fifty thousand pounds at retail price.
Three of those cannabis factories were found in Blackpool at addresses on Kirby Road, Reads Avenue and Shaw Road.
Another was in Nuneaton, while the remnants of a former canabis form were found at Heywood, Manchester.
Forty nine years old Xun Zhang, from Sheffield, was today given six years and eight months jail.
Her twenty three years old don Haobu Dou received a six year term from a judge at Preston Crown Court.
Both had denied a charge of conspiracy to produce cannabis between dates in June 2010 and March last year, but were found guilty by a jury following a nine week trial.
Another man, Baoming Yang, aged forty six, from Nuneaton had pleaded guilty to the charge.
He was given ten months jail which will mean his immediate release due to time spent on remand.
Judge Ian Leeming QC said the two main defendants had controlled all the properties concerned.
In June 20109 police had searched a property in Sheffield and found a cannabis farm in operation there.
Dou was interviewed and released without charge, but officers didn’t know at that stage his connection with other sites.
The judge said of the conspiracy “This was a long continuing and extremely determined effort to produce very substantial quantities of cannabis at various locations”.