The Three Sisters
...being that the beans nitrogenate the soil and climb up the corn while the squash provides mulch. All plants are useful and you end up with an interdependent, self-sustaining beneficial feedback loop. Some people add a fourth sister, Rocky Mountain bee plant (Cleome serrulata) which attracts pollinating insects for the corn and squash. We added a drip irrigation system on a timer (more on that in a later post) which has seemed to keep the plants h...