The phrase is often used in a spiritual or cultural context, to describe the way in which people can grow and develop through their connection to the land and their ancestors. It is also used in a more general sense, to describe the way in which anything can grow and develop from its roots or foundations.
For example, a person might talk about the way in which their family has "grown from the land" over generations, or the way in which a business has "grown from the land" by starting small and then expanding over time.
The phrase "tupu-a-nuku" is a reminder of the importance of our connections to the land and our ancestors, and of the potential for growth and development that these connections can provide.