New Weapon in Water Conservation Wars: The Peanut

July 18th, 2010 by Tina Casey

The University of Florida has come up with a new tool for property owners to make significant strides in water conservation: the peanut, or at least, a distant cousin called rhizoma perennial peanut. The colorful groundcover does not bear edible goobers, but it does have lush foliage and light orange flowers. Looks aside, it can thrive on half the water that turfgrass uses.

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Perennial peanut groundcover offers another advantage over turfgrass, too. Being a legume, it makes its own nitrogen and therefore requires very little fertilizer. Although excess nitrogen is typically thought of as a water quality issue in commercial agriculture, according to the U.S. EPA homeowners tend about 40 million acres of turfgrass, making it the fifth largest crop in the country.

Turfgrass for Me, Not for Thee

That’s right, household turfgrass is only behind corn, soybeans, wheat, and hay in terms of cropland acreage, and it uses about the same amount of fertilizer as row crops. Outdoor watering also accounts for 30% of household water use, much of that likely going to turfgrass. In other words, individual households cumulatively play a major role in in water quality issues related to lawn care. Nevertheless, according to studies cited by the EPA most people don’t perceive that their lawn contributes to water quality problems, and they are much more likely to blame their neighbor’s lawn.

The Perennial Peanut Solution for Water Conservation

There is plenty of guidance available on lawn care, with the aim of getting land owners to use only the minimum amount of fertilizer needed for healthy turfgrass. However, the EPA found that as few as 10% of land owners test their soil to see how much is needed, and most don’t check the content of fertilizer before they apply it. It’s a clear indication that public education has its limits, and the long term solution will be to shift the American aesthetic away from turfgrass. Low maintenance groundcovers like the perennial peanut can offer a more effective alternative because of their built-in incentives: reducing water bills and cutting down on the amount of time a homeowner needs to dedicate to lawn care.

Image: Peanuts by Euromagic on flickr.com.

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Tags: fertilizer, groundcover, rhizoma perennial peanut, turfgrass, university of florida, water conservation

About the Author

Tina Casey Tina Casey specializes in military and corporate sustainability, advanced technology, emerging materials, biofuels, and water and wastewater issues. Tina’s articles are reposted frequently on Reuters, Scientific American, and many other sites. Views expressed are her own. Follow her on Twitter @TinaMCasey and Google+.

JR

This peanut perennial may be OK for Florida, but not for the remainder of the country. I suggest not watering your lawn/turf… it won’t thrive, but it’ll survive. Turfgrass releases significant amounts of oxygen into the atmosphere, which we all need. I personally think that watering your landscape (in most parts of the US) is fine, especially in the Midwest & Northeast… there is plenty of water. It’s unfortunate that so many people have moved to Texas, California & the SW, exactly the places that don’t have adequate supplies of water. The water cycle… when it rains, capture it & use it; it replenishes the Earth!
http://nfp.freehostia.com/ jim

Our solution is to never water or fertilize our lawn. It’s the same color as the Chemlawn-treated one across the street, but it’s mostly wild strawberry, clover, and “whatever”. I’m not clear on why we have lawns, anyhow.
yellow fringe

This plant is only suitable for Florida and the immediate gulf coast. Hopefully they will make the most of it, as farmers elsewhere cannot.
tee are

wow.. i just know that peanut is effective for water conservation..

hope our water could be far from disaster like oil spilling on the future