More than $6 million worth of cannabis was pulled off the streets when police charged six people and seized more than 900 plants from houses across the territory in recent weeks, police said.

Raids of eight rental properties uncovered the most extensive grow house network in the capital's history and disrupted a highly sophisticated drug syndicate that had operated in the ACT for up to six months, ACT Policing said.

The discovery of about 148 plants and a hydroponic set-up at a Kaleen home in mid-June triggered Operation Armscote.

Evidence discovered in that raid lead police to search properties in Calwell, Downer, Harrison, Kaleen, MacGregor, Nicholls and Weetangera that had extensive hydroponic set-ups. Another Calwell property was being turned into a grow house.

Police released images of the five men on Friday. Four of the images were discovered during the raids, while another image was a face-fit of a man witnesses saw near one of the grow houses.

Detective Sergeant Richard Gough believed the men could assist police in the ongoing operation.

"We believe that the men are all involved in the network of grow houses that we recently discovered.

"If you can identify the men, we urge you to contact Crime Stoppers or ACT Policing Operations to provide any information regardless of how big or small that information may seem," Detective Sergeant Gough said.

Crime Stoppers rewards of up to $1000 could be available for people who supplied information that lead to an arrest.

Police said earlier this week the grow houses shared similar equipment, which indicated they had been been set up by the same criminal group.

Detective Sergeant Gough would not comment further on the alleged links to organised crime, but said there did not appear to be any connection to bikie gangs.

He said all the properties were private rentals and people who leased them had used false identification and often reached a monthly lease agreement with the owners.

They had also paid a large bond and many had repeatedly delayed their rental inspections in recent months, police said.

Organisers appeared to have set up the house before they moved out and "put people to look after crops at premises", Detective Sergeant Gough said. So far, all those people had been Asian and none were originally from the ACT.

The six people charged over the grow houses were each charged with numerous offences related to participating in a criminal group and cultivating cannabis. They are now before the ACT Magistrates Court.

Police expect further charges will be laid and indicated more properties would be raided in coming weeks.

Detective Sergeant Gough said owners of the properties where the growing operations had been discovered were "very distraught".

Information to Crime Stoppers, 1800 333 000 or at act.crimestoppers.com.au. People with information can also call ACT Policing Operations on 131 444.