Replanting would focus on 110ha of land where the trust, through years of hard work, had managed to reduce predator levels to just 3 per cent.
"If we didn't do what we're doing there'd be no native trees left. It's for our mokopuna," Kingi added.
Kōwhairoa Peninsula was also the historic location of Komanga Marae, which burned down many years ago, and which Kaitangata hapū intends to rebuild.
Friday's funding announcement was special for a number of reasons, not only because the isolated location meant officials had to be ferried out on the harbourmaster's catamaran and then by barge.
It was also one of the last rolls of the dice for Jones ahead of the general election, and an unusual show of cross-party camaraderie, with four Northland MPs from three rival parties taking part.
Jones said the project was the start of a "thousand-year journey" to recreate the kauri forest that once dominated the area.
At the height of the kauri trade so many trees were felled and floated downstream it was possible to walk on logs from Whangaroa township to Totara North, on the other side of the harbour, without getting one's feet wet.
The pūtea [money] was a gesture of support for the trust's volunteer work, and would "add a bit of fuel" to their reforestation efforts.
As well as long-term biodiversity and tourism benefits, 10 to 14 jobs would be created during the project.
Northland regional councillor Jack Craw said the area was "incredibly important", with species of hebe and five-finger found nowhere else in New Zealand.
Ongoing pest control would be essential to ensure the new plantings were not eaten by pests or smothered by weeds, he said.
The project is supported by Te Uru Rākau, the Northland Regional Council, the Department of Conservation, Kiwis for Kiwi, Forest and Bird and Taipā Area School. Inmates at Ngāwhā prison will grow the seedlings.
Also announced on Friday was a $286,000 grant to Te Roroa Development Charitable Trust for a restoration project on the west coast, where the trust is converting 200ha of a 900ha exotic forest block to native bush, using seedlings from its own nursery.
The grant will allow the iwi to employ a nursery manager and kaimahi for three years, with the aim of producing 100,000 native seedlings a year.