Although Native Americans used this method to grow field corn, dry beans, and winter squash for the winter, I have successfully used it to grow sweet/green corn, green beans, and summer squash. A few suggestions: 1) Using a bush variety of summer squash, like pattypan, will allow you to get to the corn and beans more easily for harvest; 2) Many sweet corn varieties have short stalks that won't support tall bean varieties, so be sure to pick appropriate varieties; and 3) Your beans will probably produce for a while after the corn has been harvested, so don't remove the corn stalks when harvesting the corn.
Although Native Americans used this method to grow field corn, dry beans, and winter squash for the winter, I have successfully used it to grow sweet/green corn, green beans, and summer squash. A few suggestions: 1) Using a bush variety of summer squash, like pattypan, will allow you to get to the corn and beans more easily for harvest; 2) Many sweet corn varieties have short stalks that won't support tall bean varieties, so be sure to pick appropriate varieties; and 3) Your beans will probably produce for a while after the corn has been harvested, so don't remove the corn stalks when harvesting the corn.