The Kaikohe Co-operative is working on a web-based system for selling its produce, but Mr Shaw said online shopping lacked the social aspect of a market.
He took advice from the founder of Whangarei's hugely successful farmers' market, and teamed up with Kaikohe librarian Jessica Tuckerman to start the night market. Ms Tuckerman had hoped to set up an artisans' market, and had already done the groundwork needed to get it off the ground.
Last Thursday's market, the fifth so far, drew a few hundred people.
As well as the co-op's fresh greens, fruit and eggs, market-goers could buy Cook Islands kai, barbecued corn, hangi, second-hand goods and crafts. There were also fundraisers for an infant's unveiling and Northland College's military academy.
Families were using it for an evening out, bringing picnics or buying dinner from the stalls and listening to live music.
Mr Shaw said the location, with its playground, public toilets and free wifi, was ideal. The market would continue through summer and switch to an indoor venue in winter. The new, earlier start time of 5pm was designed to catch workers before they went home.
Giving people an opportunity to grow and buy food locally was his way of opposing the TPP trade agreement, he said.
"You can yell and shout about it, but if you go to Countdown afterwards and buy Australian beans, that's hypocrisy," he said.
Meanwhile the Wihongi Street market garden grows a wide variety of produce, including pumpkins, melons, tomatoes, kamokamo, beans, carrots, spinach and cucumbers.
The last horticultural operation there was wiped out by Cyclone Bola in 1988.