What if your garden could practically take care of itself? That’s the dream, right? The Three Sisters growing method is a timeless method used for generations by indigenous communities. The three sisters are corn, beans, and squash, which are grown together so they provide mutual benefits to aid the growing process. These benefits include support, increased nutrient availability, and weed suppression. As this method has been handed down and transitioned across cultures, a fourth sister has become much-forgotten. The sunflower, a reliable and resilient pollinator attractor for each of these crops.
What Is the Three Sisters Planting Method?
Companion planting is an incredible tool to growing a better garden, and the three sisters method proves that. Each sister provides benefits to the others that improves the overal performance of the garden. Companion planting has been shown to reduce the chance of total crop loss as the practive leads to better balance between pests and beneficial insects. Monocrops (growing too much of the same thing) can leave you susceptible to crop failure.
The Role of Each “Sister” in the Garden
Corn: The Structural Support
- Acts as a natural trellis for beans
- Roots can improve soil drainage
- Best Varieties: Heirlooms like Golden Bantam 12, Truckers Favorite, Stowells Evergreen, and Blue Hopi
While each of the three sisters' crops are central to many indigenous community diets, corn is especially meaningful as it represents life, identity, and resilience. Many parallels can be drawn between the growing habits of corn and what is required for successful communities and prosperity. From their deep roots to the need for corn to be grown in groups, these examples demonstrate how we can learn and grow from nature all around us.
Beans: The Nitrogen Fixer
- Adds nitrogen from the air into the soil
- Best Varieties: Pole types including Kentucky Blue, Blue Lake, and Cannelini
Beans have played a vital role in indigenous cultures by providing a source of protein that can be stored for year-round use when other food sources are scarce. In addition to protein, beans offer a range of vital nutrients that help to create a balanced diet.
Squash: The Living Mulch
- Large leaves suppress weeds
- Helps retain soil moisture
- Deters pests with prickly vines
- Best Varieties: Vining types. Winter squash are most common for this growing method.
Squash has not only added a range of nutrients to healthy diets; it has also served a very utilitarian role in indigenous cultures. Squash, or rather gourds, can be left to mature and dry into a hard shell that can be used for storage, drinking vessels, or a bowl and scoop for various purposes.
The Fourth Sister: Why Add Sunflowers?
- Attract Pollinators
- Draw beneficial insects
- Trap crop for birds (protect corn)
- Best Varieties: Heirlooms like Indian Blanket, Mammoth Grey Stripe, and Evening Sun
Sunflowers are the often forgotten fourth sister. Because of their tall, sturdy stems, sunflowers function much like corn in the three-sisters growing style. However, they offer their own unique benefits. Sunflowers act as pollinator and beneficial insect attractors. Plus, they can act as a trap crop for hungry birds that may otherwise go after your corn crop. They should be planted either at the same time as the corn, to be ready when the beans need vertical support.
How to Plant a Three Sisters Garden (Step-by-Step Guide)
Step 1: Choose the Right Location
Each of the three (four) sister crops grows best in full sun with well-draining soil. It is beneficial to amend your growing area with compost, worm castings, or other sources of organic matter to improve water retention and nutrient delivery. Growing cover crops in the fall or early spring can help prepare your garden for greater success in the next growing season.
Step 2: Choose a Planting Style
The three-sisters garden can be grown in either mounds or rows. Both methods have been used by different indigenous communities depending on the water availability in their regions. Mounds are most popularly used and are usually spaced several feet apart (3-4 feet minimum).
Rows should be planted with blocks of 2-4 corn rows, with beans around the corn's perimeter. Squash can then be planted between corn blocks. This method allows you to still enjoy the natural companion planting benefits while being able to efficiently deliver water to all crops.
Step 3: Planting Order and Spacing
- Corn & Sunflowers - Sow the corn seeds and sunflower seeds first in mounds of 3 corn seeds and 1-2 sunflower seeds about 12 inches apart.
- Beans - About two weeks after sowing the corn, or when the corn is 4-6 inches tall, sow 3 bean seeds near each corn stalk.
- Squash - Sow 2 squash seeds about a week following the beans (which have visibly emerged from the ground). Sow the squash seeds around the outer edges of the mound to allow plenty of space for outward spreading vines.
1 comment
Thank you for explaining the timing of planting the corn, beans, and squash.