About 14,000 cannabis plants and 13kg of the drug have been recovered during a month-long operation in the Eastern police district.
Thirty officers searched 210 properties from Central Hawke's Bay to East Cape, including 26 in urban Napier and Hastings identified from spotter planes.
They caught 185 people, many of whom will face charges related to the cultivation, possession and supply of cannabis, the manufacturing of cannabis oil and firearms offences. A small amount of cocaine was found at one house.
Police found 35 firearms, including shotguns, sawn-off shotguns and handguns.
Eastern organised crime group head Detective Senior Sergeant Mike Foster said police were pleased with the results of the operation and would maintain their focus on cannabis crime.