Police say officers have seized 444kg of cannabis in the Auckland suburb of Manurewa.
Nobody was arrested during the operation as officers carried out four search warrants in several flats, police said in a statement.
Investigations were ongoing to locate those responsible for the operation of at least 357 cannabis plants, Counties Manukau Central Area Commander Insp Adam Pyne said.
"Approximately half of the plants were nearing maturity for harvesting and we also found a significant amount of packaged cannabis located inside the oven in one of the flats.
"We are elated to have this illegal drug off the streets and out of the hands of dealers, and those would make profit from it."
The cannabis had an estimated street value of between $200,000 and $600,000, police said.
Anyone with information relating to the operation was urged to contact police on 105, quoting file number 240530/6133.
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