Police have seized about 9500 cannabis plants during a joint three-week drug operation with the New Zealand Defence Force (NZDF).
The cannabis plants, which were grown illicitly in remote areas, were found in the Tasman and Central Police districts.
A Royal New Zealand Air Force NH90 helicopter was used to remove the cannabis plants from the area.
Royal New Zealand Air Force's air commodore Tim Walshe said helicopter support for the operation was important because cannabis plants were grown illicitly in remote areas.