In my region the local First Nations people, Mi'Kmaq, teach it to students in local schools. One school made a garden and planted the corn, beans, squash. So at

In my region the local First Nations people, Mi'Kmaq, teach it to students in local schools. One school made a garden and planted the corn, beans, squash. So at least here it's been talked about. I think they are, rightly, proud of the technique and implementing it. So I would say at least in this region of Mi'Kmaq (south eastern Canada) it was known about and used.