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  • From: "Tradingpost" <tradingpost@gilanet.com>
  • To: livingontheland@lists.ibiblio.org
  • Subject: [Livingontheland] The Three Sisters—or Is it Four?
  • Date: Mon, 21 Nov 2005 06:29:55 -0700

http://www.patternliteracy.com/gg3sisters.html

The Three Sisters—or Is it Four?

(An excerpt from Gaia's Garden)

Let's begin our exploration of guilds (communities of plants for the garden)
with a very simple example that illustrates some essential principles. Then
we can proceed to more complex guilds—ones that go beyond vegetables.

Familiar to many gardeners is the Native American triad of corn, beans, and
squash, a combination often called the Three Sisters. The trio qualifies as a
guild because each of these plants supports and benefits the others. The
cornstalks form a trellis for the bean vines to climb. The beans, in turn,
draw nitrogen from the air, and via symbiotic bacteria convert the nitrogen
to plant-available form. These nitrogen-fixing bacteria, scientists have
recently learned, are fed by special sugars that ooze from the corn roots.
The rambling squash, with its broad leaves, forms a living parasol that
densely covers the ground, inhibiting weeds and keeping the soil cool and
moist. Together the Three Sisters produce more food, with less water and
fertilizer, than a similar area planted to any one of these three crops in
isolation. Jane Mt. Pleasant, an agronomist at Cornell University who has
blended her Iroquois heritage with her research, has shown that yields of
this guild, measured in calories, are about 20 percent higher than corn grown
alone in an equal-sized plot.

Look at how many interconnections this guild bears. Beans furnish nitrogenous
fertility for themselves, corn, and squash; squash shades soil for the
benefit of all three; corn feeds the bean-hugging bacterial nodules and
creates a trellis for the beans. Three plants, weaving at least eight
connections. The Three Sisters guild is a perfect place to begin creating a
richly connected garden.

In the Southwest, a fourth "sister" is found in this guild: Rocky Mountain
bee plant (Cleome serrulata). Often growing near former Anasazi
settlements—it's virtually an indicator plant for ancient ruins—this 2- to
5-foot tall, pink-flowered cleome is a powerful attractant for beneficial
insects that pollinate beans and squash. The young leaves, flowers, and seed
pods of bee plant are edible, and native people boiled and ate them, or made
a paste from the plant for later use. Bee plant also accumulates iron, and
thus is the source of a deep-hued paint used to create the characteristic
black designs on Anasazi pottery. Songs and blessings of New Mexico's Tewa
people mention corn, beans, squash, and bee plant, indicating that this
multi-functional flower is an integral member of a sacred plant pantheon.

I was pleased to learn of this fourth sister, as it connects the web of this
guild's beneficial interactions with the insect realm. Part of the strength
of corn/beans/squash comes from its tie-in with a non-vegetable domain: that
of the symbiotic nitrogen-fixing bacteria carried by the beans. And now, by
adding a fourth plant to the guild, the web's pattern strengthens further,
drawing insects into the network. Lured by bee plant, these nectar-slurpers
will pollinate the squash and beans (corn is wind pollinated), ensuring good
fruit set. By extending the three sisters, we've moved into three kingdoms:
animal, plant, and bacterial. Creating this connectedness allows us to draw
upon three billion years of life's wisdom for aid. A typical apple-centered
guild. Below the apple tree, a ring of attractive and grass-suppressing bulbs
encloses flowering and food-producing plants that also provide mulch and
habitat for beneficial insects. The apple tree is nurtured by this community
of multifunctional plants making less work—and more food and flowers—for the
gardener.

The lesson here is that by hooking into the cyclical rhythms of
many-kingdomed nature, a guild can capitalize on enormous sources of energy
and experience. Focusing only on food plants sucks fertility from the soil
while giving little in return. In contrast, offering a little something
extra—a habitat for bees, a home for soil organisms—ties the small cycles of
our garden into the generous and large cycles of nature. Growing a few
early-blooming flowers encourages bees and other beneficial insects to stick
around when the fruit trees need pollination and the aphids begin to swarm.
Leaving last fall's leaves to compost on a flower bed nurtures a healthy crop
of worms to till and aerate soil and to shed nutrient-rich worm castings down
among the roots. Our small offerings bring large rewards. In effect, if we
buy the first round of drinks, nature picks up the tab for dinner and a show.
We can leverage our assets into a not-so-small fortune by piggy-backing onto
the pooled resources of the natural economy. By making nature our partner,
our yields multiply, and risk of failure declines.

The addition of bee plant boosts the three sisters into a more powerful
foursome. This illustrates a useful rule for guild design: Start with
something known and basic, and gradually add connections. We now have a hint
about creating our own guilds. Let's see how a more complex guild is
constructed, and then we can develop more guidelines for building our own.





  • [Livingontheland] The Three Sisters—or Is it Four?, Tradingpost, 11/21/2005

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