Just two days into a drug operation more than $1 million worth of cannabis has been destroyed.
Waitemata police have begun a region-wide operation that has netted more than 1000 cannabis plants from areas including Piha, Bethell's Beach and Oratia.
Police have made arrests for cultivating cannabis, possession of ecstasy and possession of firearms.
Operation Ruth began gathering information late last year in part from tip-offs from the public.
Detective Sergeant Callum McNeill says the public have really got behind them to try to eradicate drugs.
"It's that time of the year when we go out collecting cannabis. We are concentrating on rural areas throughout the Waitemata district. This is part of a nationwide operation that takes place every year," he says.
Last week the focus was on Northland where more than 8500 plants were destroyed.
The air force has been providing aerial views to help spot crops.
Mr McNeill urges people to look out for suspicious behaviour such as fences or gates damaged, people carrying gardening equipment into the bush and unknown vehicles and people hanging around.
If you have information about illegal drug operations contact Crimestoppers on 0800 555 111.