Native American tribes have been using the Three Sisters garden, a traditional companion <a href="https://alifeinthewild.com/garden-of-eatin/tips-on-how-to-grow-field-peas-using-cover-cropping/" target="_blank" rel="noopener">planting technique</a>, for years. It entails symbiotically growing corn, beans, and squash together. Beans can climb up the corn...