Three Sister is a common technique. At least in my region for First Nations people (as we say here). Three Sisters is corn/maize, squash, pole beans (climbing).
Squash leaves are big so shade the roots of the corn, the beans fix nitrogen in the soil, the corn stalks give the beans something to climb on.
Then there is the food types each providing different nutrition.
I always wonder how common it was. You hear it mentioned anytime agriculture stuff gets brought up, but I wonder if it was a small group of people doing this and then everyone acting like all natives did it, or if it was actually widespread as people make it out to be.
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.
This was often supplemented by burying a fish or other animal near/in where the Three Sisters were planted, providing ample nutrients for less perishable foodstuffs to grow.
I think lobsters was a big part of that. The lobsters used to be in the waters near shorelines supposedly. Even recently i.e. early 1900s before lobster was popular I've heard farmers would gather them on beaches and use them for fertilizer. I live on an island so it's a common thing here to have farms near beaches.
Squash leaves are big so shade the roots of the corn, the beans fix nitrogen in the soil, the corn stalks give the beans something to climb on.
Then there is the food types each providing different nutrition.