Almost two decades after a pioneering hempcrete structure was built near the Pine Ridge Reservation in South Dakota, members of the Oglala Sioux Tribe’s Makoce Agriculture Program learned how to spray hempcrete this summer.

A global enterprise based in Spain may seem an unlikely role model for a fledging American Indian initiative. But inspired by its success, Winona’s Hemp and Heritage Farm in Anishinaabeg territory is sowing the start of an intertribal cooperative consortium.