RISMEDIA, April 8, 2009-(MCT)-With Earth Day just around the corner (April 22), many of us are thinking of ways in which we can live a greener lifestyle. Now that spring has arrived, one of the best ways to go green at home is to use less water in both your yard and garden.
April brings showers and showers revive grass, but soon thereafter, people start showering their lawns.
The average lawn rarely needs to be watered, said Bruce Augustin, chief agronomist for Scotts Miracle-Gro Co., a garden products company. Many homeowners think they have to water their lawns because everybody does it, Augustin said. Yet federal research shows only about 15% of homeowners actually do, and the other 85% still have lawns. Here’s why – even if you and your grass are completely hooked on the sprinkler – you can (and should) start weaning your lawn.
For example, the Chicago area gets about 36 inches of rain a year on average; its grasses need about 43, Augustin said.
Overwatering is bad for your grass. It encourages weak, stunted roots that can’t keep the grass alive when the weather gets dry. It fosters fungus diseases and provides a perfect home for root-munching grubs.
Too much watering also pushes grass to grow faster. Lay off the sprinkler and you can mow less often.
What happens to water that your grass doesn’t need and can’t soak up? It runs off into storm drains and, combined with sewage, increases the load on treatment plants. If you’re also overfertilizing, as many people do, the runoff can carry nitrogen and phosphorus that pollute rivers and lakes.
There are other environmental costs that come with watering your lawn too much. The water from your outdoor faucet had to be taken from either a lake or a well; filtered; treated with chemicals to make it safe enough to drink and pumped to your house, at a cost in energy as well as tax dollars. Using potable water for lawns is wasteful, and “your lawn doesn’t really need fluoride,” said Debra Shore, commissioner of the Metropolitan Water Reclamation District of Greater Chicago.
In a world in which fresh water is growing ever more scarce, those of us blessed with an abundance of it “have a moral obligation to show that we are using it wisely and carefully and respectfully,” Shore said.
Here are some tips to keep your lawn happy and be conscious of the environment at the same time:
Mow it high – It’s the single most powerful thing you can do to get a lawn that uses less water, has fewer weeds and needs less fertilizer: Set your mower as high as it will go and leave it there.
Short grass is weak and needy. Taller grass – 3 to 4 inches – grows deep roots that absorb water and nutrients efficiently, collects more life-giving sunlight and shades or crowds out many weeds. Taller grass doesn’t mean you will have to mow more often, but when you do, leave the clippings on the lawn to return moisture and nutrients to the grass.
Get a rain gauge – Knowing how much rain has fallen will reassure you that you don’t need to water. When tempted to water your lawn, get a trowel and dig out a plug of lawn. If the soil is moist within the plants’ root zone, 3 or 4 inches down, leave the sprinkler in the garage.
Get sturdy grass – Fescues are tough and thrifty with water. Usually fescue seed is mixed with bluegrass, which is less drought-resistant but finer and spreads to knit the lawn together. Use a fescue-rich mix to seed or overseed. If your lawn is all bluegrass, overseed yearly with fescue.
Establish grass well – The only time to water your lawn every day is when you have scattered seed, in early spring or early fall, and are waiting for it to sprout. A brief sprinkle will do, just enough to keep the seed moist. Spread mulch to hold the water around the seed.
Embrace summer dormancy – Grass naturally quits growing and dries out in the hottest part of summer, then revives and greens up when fall rains come. Go with the flow rather than watering to force the grass to stay all-green, and you’ll save water and escape mowing under the hot August sun.
Water long and deep – When you do water your lawn, run the sprinkler long enough to lay down the equivalent of 1 inch of rain. (Use a rain gauge to check). Don’t water again until your trowel test tells you the grass needs it.
Fertilize, but not too much – A good lawn does not require the heavily advertised five-times-a-year fertilizing schedule. An application of slow-release fertilizer once in spring and once in early fall is enough.
Work on the soil – Top-dress the soil with screened compost at least once a year to foster the rich ecosystem of underground organisms that delivers nutrients to roots and makes soil great.
© 2009, Chicago Tribune.
Distributed by McClatchy-Tribune Information Services.