How did Southeastern Indigenous farmers plant corn, beans, and squash together?

Indigenous farmers in the American Southeast cultivated corn, beans, and squash together using a highly efficient agricultural system known as the Three Sisters. This method relied on a symbiotic relationship between the three plants, which were typically sown together in mounds or ridges.12

The planting process generally followed these steps:
* Preparation: Farmers prepared the soil using mattocks and hoes, creating mounds approximately two feet in diameter by punching holes with digging sticks and covering the seeds with earth.2
* Corn: Considered the eldest sister, corn was planted first as it emerged quickly and provided a sturdy, natural trellis for the other crops.13
* Beans: Planted adjacent to the corn, bean vines used the cornstalks to climb upward. These plants were essential for soil health, as they utilized nitrogen-fixing bacteria in their roots to provide natural fertilizer for the corn and squash.13
* Squash: The youngest sister, squash was planted to grow along the ground. Its large, fan-shaped leaves served as a living mulch, shading the soil to retain moisture and effectively crowding out weeds.12

This polyculture approach allowed for high yields without the need for synthetic fertilizers or mechanization, providing a reliable food base that supported complex societies.12