NZ Herald
  • Home
  • Latest news
  • Herald NOW
  • Video
  • New Zealand
  • Sport
  • World
  • Business
  • Entertainment
  • Podcasts
  • Quizzes
  • Opinion
  • Lifestyle
  • Travel
  • Viva
  • Weather

Subscriptions

  • Herald Premium
  • Viva Premium
  • The Listener
  • BusinessDesk

Sections

  • Latest news
  • New Zealand
    • All New Zealand
    • Crime
    • Politics
    • Education
    • Open Justice
    • Scam Update
  • Herald NOW
  • On The Up
  • World
    • All World
    • Australia
    • Asia
    • UK
    • United States
    • Middle East
    • Europe
    • Pacific
  • Business
    • All Business
    • MarketsSharesCurrencyCommoditiesStock TakesCrypto
    • Markets with Madison
    • Media Insider
    • Business analysis
    • Personal financeKiwiSaverInterest ratesTaxInvestment
    • EconomyInflationGDPOfficial cash rateEmployment
    • Small business
    • Business reportsMood of the BoardroomProject AucklandSustainable business and financeCapital markets reportAgribusiness reportInfrastructure reportDynamic business
    • Deloitte Top 200 Awards
    • CompaniesAged CareAgribusinessAirlinesBanking and financeConstructionEnergyFreight and logisticsHealthcareManufacturingMedia and MarketingRetailTelecommunicationsTourism
  • Opinion
    • All Opinion
    • Analysis
    • Editorials
    • Business analysis
    • Premium opinion
    • Letters to the editor
  • Politics
  • Sport
    • All Sport
    • OlympicsParalympics
    • RugbySuper RugbyNPCAll BlacksBlack FernsRugby sevensSchool rugby
    • CricketBlack CapsWhite Ferns
    • Racing
    • NetballSilver Ferns
    • LeagueWarriorsNRL
    • FootballWellington PhoenixAuckland FCAll WhitesFootball FernsEnglish Premier League
    • GolfNZ Open
    • MotorsportFormula 1
    • Boxing
    • UFC
    • BasketballNBABreakersTall BlacksTall Ferns
    • Tennis
    • Cycling
    • Athletics
    • SailingAmerica's CupSailGP
    • Rowing
  • Lifestyle
    • All Lifestyle
    • Viva - Food, fashion & beauty
    • Society Insider
    • Royals
    • Sex & relationships
    • Food & drinkRecipesRecipe collectionsRestaurant reviewsRestaurant bookings
    • Health & wellbeing
    • Fashion & beauty
    • Pets & animals
    • The Selection - Shop the trendsShop fashionShop beautyShop entertainmentShop giftsShop home & living
    • Milford's Investing Place
  • Entertainment
    • All Entertainment
    • TV
    • MoviesMovie reviews
    • MusicMusic reviews
    • BooksBook reviews
    • Culture
    • ReviewsBook reviewsMovie reviewsMusic reviewsRestaurant reviews
  • Travel
    • All Travel
    • News
    • New ZealandNorthlandAucklandWellingtonCanterburyOtago / QueenstownNelson-TasmanBest NZ beaches
    • International travelAustraliaPacific IslandsEuropeUKUSAAfricaAsia
    • Rail holidays
    • Cruise holidays
    • Ski holidays
    • Luxury travel
    • Adventure travel
  • Kāhu Māori news
  • Environment
    • All Environment
    • Our Green Future
  • Talanoa Pacific news
  • Property
    • All Property
    • Property Insider
    • Interest rates tracker
    • Residential property listings
    • Commercial property listings
  • Health
  • Technology
    • All Technology
    • AI
    • Social media
  • Rural
    • All Rural
    • Dairy farming
    • Sheep & beef farming
    • Horticulture
    • Animal health
    • Rural business
    • Rural life
    • Rural technology
    • Opinion
    • Audio & podcasts
  • Weather forecasts
    • All Weather forecasts
    • Kaitaia
    • Whangārei
    • Dargaville
    • Auckland
    • Thames
    • Tauranga
    • Hamilton
    • Whakatāne
    • Rotorua
    • Tokoroa
    • Te Kuiti
    • Taumaranui
    • Taupō
    • Gisborne
    • New Plymouth
    • Napier
    • Hastings
    • Dannevirke
    • Whanganui
    • Palmerston North
    • Levin
    • Paraparaumu
    • Masterton
    • Wellington
    • Motueka
    • Nelson
    • Blenheim
    • Westport
    • Reefton
    • Kaikōura
    • Greymouth
    • Hokitika
    • Christchurch
    • Ashburton
    • Timaru
    • Wānaka
    • Oamaru
    • Queenstown
    • Dunedin
    • Gore
    • Invercargill
  • Meet the journalists
  • Promotions & competitions
  • OneRoof property listings
  • Driven car news

Puzzles & Quizzes

  • Puzzles
    • All Puzzles
    • Sudoku
    • Code Cracker
    • Crosswords
    • Cryptic crossword
    • Wordsearch
  • Quizzes
    • All Quizzes
    • Morning quiz
    • Afternoon quiz
    • Sports quiz

Regions

  • Northland
    • All Northland
    • Far North
    • Kaitaia
    • Kerikeri
    • Kaikohe
    • Bay of Islands
    • Whangarei
    • Dargaville
    • Kaipara
    • Mangawhai
  • Auckland
  • Waikato
    • All Waikato
    • Hamilton
    • Coromandel & Hauraki
    • Matamata & Piako
    • Cambridge
    • Te Awamutu
    • Tokoroa & South Waikato
    • Taupō & Tūrangi
  • Bay of Plenty
    • All Bay of Plenty
    • Katikati
    • Tauranga
    • Mount Maunganui
    • Pāpāmoa
    • Te Puke
    • Whakatāne
  • Rotorua
  • Hawke's Bay
    • All Hawke's Bay
    • Napier
    • Hastings
    • Havelock North
    • Central Hawke's Bay
    • Wairoa
  • Taranaki
    • All Taranaki
    • Stratford
    • New Plymouth
    • Hāwera
  • Manawatū - Whanganui
    • All Manawatū - Whanganui
    • Whanganui
    • Palmerston North
    • Manawatū
    • Tararua
    • Horowhenua
  • Wellington
    • All Wellington
    • Kapiti
    • Wairarapa
    • Upper Hutt
    • Lower Hutt
  • Nelson & Tasman
    • All Nelson & Tasman
    • Motueka
    • Nelson
    • Tasman
  • Marlborough
  • West Coast
  • Canterbury
    • All Canterbury
    • Kaikōura
    • Christchurch
    • Ashburton
    • Timaru
  • Otago
    • All Otago
    • Oamaru
    • Dunedin
    • Balclutha
    • Alexandra
    • Queenstown
    • Wanaka
  • Southland
    • All Southland
    • Invercargill
    • Gore
    • Stewart Island
  • Gisborne

Media

  • Video
    • All Video
    • NZ news video
    • Herald NOW
    • Business news video
    • Politics news video
    • Sport video
    • World news video
    • Lifestyle video
    • Entertainment video
    • Travel video
    • Markets with Madison
    • Kea Kids news
  • Podcasts
    • All Podcasts
    • The Front Page
    • On the Tiles
    • Ask me Anything
    • The Little Things
  • Cartoons
  • Photo galleries
  • Today's Paper - E-editions
  • Photo sales
  • Classifieds

NZME Network

  • Advertise with NZME
  • OneRoof
  • Driven Car Guide
  • BusinessDesk
  • Newstalk ZB
  • Sunlive
  • ZM
  • The Hits
  • Coast
  • Radio Hauraki
  • The Alternative Commentary Collective
  • Gold
  • Flava
  • iHeart Radio
  • Hokonui
  • Radio Wanaka
  • iHeartCountry New Zealand
  • Restaurant Hub
  • NZME Events

SubscribeSign In
Advertisement
Advertise with NZME.
Home / Crime

Cannabis grower jailed for Northland’s largest known operation

Shannon Pitman
By Shannon Pitman
Open Justice multimedia journalist, Whangārei·NZ Herald·
1 Sep, 2023 05:00 PM4 mins to read

Subscribe to listen

Access to Herald Premium articles require a Premium subscription. Subscribe now to listen.
Already a subscriber?  Sign in here

Listening to articles is free for open-access content—explore other articles or learn more about text-to-speech.
‌
Save

    Share this article

Oai Duc Truong was found guilty of a large-scale operation of cannabis cultivation and supply. Photo / Shannon Pitman

Oai Duc Truong was found guilty of a large-scale operation of cannabis cultivation and supply. Photo / Shannon Pitman



When police were conducting a yearly rural cannabis helicopter flyover, by chance they came across the largest cannabis operation ever seen in Northland, with an estimated street value of $24 million.

Now, that flyover has resulted in a jail term of more than seven years for the man in charge of it.

Advertisement
Advertise with NZME.
Advertisement
Advertise with NZME.

The bust in January 2020, uncovered the underground business of Oai Duc Truong, a New Zealand citizen, and a large commercial cannabis operation in Te Kōpuru which eventually led police to two more grow sites in Kerikeri and West Auckland.

The Te Kōpuru site was rented in Truong’s name at a sawmill site on Oturei Settlement Rd and had five poorly built garden sheds covered in polyurethane but with a sophisticated grown system inside.

Plants at various stages of growth indicated a year-round operation was in place, with each plant being individually fed, on timed lighting phases and in fertilised heat pots.

More than 6000 cannabis plants and 1000 pounds of cannabis bud were seized.

Advertisement
Advertise with NZME.

Officer Conan Brown said, in his long history with the police, it was “the largest I had ever seen”.

Over 6000 plants were found in Te Kopuru at various stages of growth.  Photo / NZME
Over 6000 plants were found in Te Kopuru at various stages of growth. Photo / NZME

Brown described hovering above in a helicopter, and the heat and smell coming off the hot houses as “overwhelming”.

Police would then be led to another site on Montrose Rd, Kerikeri in July 2020 with the same set-up and the same rare Canadian trimming mill used to prune the plants of their buds.

This site had over 2000 plants seized and led police to the final site in Massey, Auckland.

In Massey, three adjoining units were found to be rented in Truong’s name housing more cannabis plants at various stages of growth, large-scale cables, lights, indoor hydroponics and a sophisticated power set-up.

The site had holes in the walls to enable the gardeners to move easily between units without having to go outside and raise suspicion.

Within days of Truong being released on bail following his arrest, he attempted to persuade his local horticulture supplier, who was already suspicious after Truong paid $32,000 in cash for pot plants, to tell the police he was just a translator for two men.

When that didn’t work, he sent his wife to the man to try to convince him again to lie for him.

The gardeners had arrived from Vietnam on visitor permits and lived on site in primitive conditions, four of those gardeners have since been sentenced to two years and nine months’ imprisonment.

They were Minh Nhat Nguyen, 24, and Nhat Quan Nguyen, 20, 44-year-old Chu Trong Thanh and 45-year-old Dang Gia Cu.

Advertisement
Advertise with NZME.

Truong, who was educated and lived in Auckland, maintained through trial he was merely helping two men known as “David and Lee” pick up gardening supplies, help with translation and hire rental cars.

David and Lee were never found by either the defence or the Crown.

Truong also claimed, that although he rented the sites, he believed the gardeners were growing blueberries for the markets in Auckland and had no idea they were growing cannabis.

At sentencing in the Whangārei District Court, Judge John McDonald said the explanation was “absolute nonsense”.

“Growing blueberries for Auckland markets. In a remote location. Out of the way, out the back and beyond of Poutu Peninsula, away from prying eyes.

“How you thought you could hoodwink a Whangārei jury you were innocently caught up in a criminal enterprise is completely beyond me,” Judge McDonald said.

Advertisement
Advertise with NZME.

Judge Mcdonald said perhaps there were others involved in the operation but Truong’s name was all over the evidence, in a role to support the growers.

“You were fully involved in this,” Judge McDonald said.

Truong was sentenced to seven years and five months’ imprisonment and will be required to go before the Parole Board for release.

Shannon Pitman is a Whangārei-based reporter for Open Justice covering courts in the Te Tai Tokerau region. She is of Ngāpuhi/ Ngāti Pūkenga/Ngātiwai descent and has worked in digital media for the past five years. She joined NZME in 2023.



Advertisement
Advertise with NZME.


Save

    Share this article

Latest from Crime

New Zealand|crime

Ex-Outlaws leader bought guns for protection while on parole, sold meth to pay for them

18 Jun 06:00 AM
New Zealand|crime

Father, daughter steal $190k in ATM heist, $159k still missing

18 Jun 04:09 AM
New Zealand|crime

'I hate him': Partner of slain Tribesman lays blame for death at president's feet

18 Jun 03:00 AM

Jono and Ben brew up a tea-fuelled adventure in Sri Lanka

sponsored
Advertisement
Advertise with NZME.

Latest from Crime

Ex-Outlaws leader bought guns for protection while on parole, sold meth to pay for them

Ex-Outlaws leader bought guns for protection while on parole, sold meth to pay for them

18 Jun 06:00 AM

The convicted drug dealer was a friend of murdered Outlaws president Peter Lui.

Father, daughter steal $190k in ATM heist, $159k still missing

Father, daughter steal $190k in ATM heist, $159k still missing

18 Jun 04:09 AM
'I hate him': Partner of slain Tribesman lays blame for death at president's feet

'I hate him': Partner of slain Tribesman lays blame for death at president's feet

18 Jun 03:00 AM
Baby-killing Mobster loathed being called 'kid killer' in prison, so he murdered again

Baby-killing Mobster loathed being called 'kid killer' in prison, so he murdered again

18 Jun 12:40 AM
Help for those helping hardest-hit
sponsored

Help for those helping hardest-hit

NZ Herald
  • About NZ Herald
  • Meet the journalists
  • Newsletters
  • Classifieds
  • Help & support
  • Contact us
  • House rules
  • Privacy Policy
  • Terms of use
  • Competition terms & conditions
  • Our use of AI
Subscriber Services
  • NZ Herald e-editions
  • Daily puzzles & quizzes
  • Manage your digital subscription
  • Manage your print subscription
  • Subscribe to the NZ Herald newspaper
  • Subscribe to Herald Premium
  • Gift a subscription
  • Subscriber FAQs
  • Subscription terms & conditions
  • Promotions and subscriber benefits
NZME Network
  • The New Zealand Herald
  • The Northland Age
  • The Northern Advocate
  • Waikato Herald
  • Bay of Plenty Times
  • Rotorua Daily Post
  • Hawke's Bay Today
  • Whanganui Chronicle
  • Viva
  • NZ Listener
  • Newstalk ZB
  • BusinessDesk
  • OneRoof
  • Driven Car Guide
  • iHeart Radio
  • Restaurant Hub
NZME
  • About NZME
  • NZME careers
  • Advertise with NZME
  • Digital self-service advertising
  • Book your classified ad
  • Photo sales
  • NZME Events
  • © Copyright 2025 NZME Publishing Limited
TOP