Dame Jenny was speaking to a packed room of more than 200 women at the Copthorne in Waitangi on Thursday evening for the launch of the Bay of Islands Women's Nexus, a new business networking group.
She challenged the Northland businesswomen to abandon outdated, inherited prejudice against foreign investment.
"I challenge you as businesspeople to not suspend your judgment or values, but don't bring your prejudice to the table," she said.
"Are we open for business or have we grandma on our shoulder?
"There are many business models that can provide a win/win for everyone.
"The sphere of influence in the last 25 years included the US, Europe and Britain. They allowed New Zealand to be wealthy.
"In the next 25 years, that will shift as the Chinese are the emerging population."
Dame Jenny said Asian tourists also wanted to experience the "treasures" of Northland - access to blue skies, clear water and a clean environment.
Northland was ripe with trading opportunities with Ngapuhi set to become a major economic driver after its Treaty claim settlement. And she was shocked Maori stories were not being told.
She said too that Northlanders needed to remember that Russell was a thriving international trade harbour in the 1800s, with local Maori doing business with 130 ships per month from America, Britain and France.