A Three Sisters garden consists of corn, pole beans that climb the corn, and squash. The leaves of the squash shade the ground and help retain soil moisture.
Who says boys can't grow Three Sisters? Above and below Tosh inspects his corn.
Below: Tosh marks his territory:
I plant the Three Sisters in different ways. One way is in rows, so that each plant is separate from the others (although this is not the “interactive” way to plant them). Another is to follow these instructions from NativeTech: Native American Technology and Art at http://www.nativetech.org/cornhusk/threesisters.html
1. In late May or early June, hoe up the ground and heap the earth into piles about a foot high and about 20 in. across. The centers of your mounds should be about four feet apart and should have flattened tops.
Below: For Three Sisters in my large garden, I didn't make individual mounds. I made "grave" mounds.
2. First, in the center of each mound, plant five or six corn kernels in a small circle.
3. After a week or two, when the corn has grown to be five inches or so, plant seven or eight pole beans in a circle about six inches away from the corn kernels.
4. A week later, at the edge of the mound about a foot away from the beans, plant seven or eight squash or pumpkin seeds.
5. When the plants begin to grow, you will need to weed out all but a few of the sturdiest of the corn plants from each mound. Also keep the sturdiest of the bean and squash plants and weed out the weaker ones.
6. As the corn and beans grow up, you want to make sure that the beans are supported by cornstalks, wrapping around the corn. The squash will crawl out between the mounds, around the corn and beans, as seen in Tosh's garden below.
You also can plant the Three Sisters in a raised bed: