A long, hot summer sounds like torture for your lawn. Summer's scorching days and improper lawn maintenance turn a lawn brown and weak, allowing weeds, insects, and disease to infiltrate easily. The best way to deal with summer lawn crises is to prevent them before they start.
"What most homeowners don't realize is that they're dealing with something that happened a month ago," says Doug Fender, executive director of the Turfgrass Resource Center. "They see the symptoms and treat the lawn, but it will take another month for the symptoms to go away. They don't think about the curatives that could have prevented it."
To avoid summer problems, start tending your lawn early in the growing season. The best prevention is a lawn that is vigorous and thick. It will ward off weeds, insects, and diseases better than any other measures.
Early Season CareFor cool-climate (Kentucky bluegrass, fescue, perennial ryegrass) grasses, it's best to aerate and fertilize the lawn before the grass gets going later in May and June. Don't fertilize cool-climate grasses again until fall.
Sharpen the lawn mower blade in spring so the grass will be cut cleanly, not shredded. This will help stave off diseases. Cut only a third of the grass blade when you mow, and raise the mower height gradually by 25 to 50 percent as temperatures rise. Don't cut your cool-climate lawn lower than 2 to 2-1/2 inches.
Water uniformly, deeply, and infrequently in the early morning with a sprinkler or an in-ground system. Your lawn should receive a total of 1 inch of water a week, including rain and irrigation. Check for uniformity by putting out a half-dozen tuna-size cans. See how long it takes the water to fill each one, then correct the system if some cans are receiving more water than others. Another test Fender recommends is poking a screwdriver into the ground: If it goes in easily, the water level is fine; if it's difficult to push in, water longer and deeper.
If you live in a hot dry climate, cool season grasses will go dormant in midsummer and turn brown. This isn't necessarily a bad thing; unless you have a prolonged drought, the turf will come back fine once the weather cools off and the rain comes.
If you are serious about keeping a lawn green during the hot summer months, apply one inch of water to the lawn each week (unless Mother Nature helps you out). The worst approach you can take is to allow the grass to go dormant, then water it long enough to start growth, then let it go dormant again.
Let grasses grow a little longer during the warmer months. The extra shade will help keep the root zone cool, and reduce water loss from the soil. Don't fertilize or apply weed killers at this time.
Late Season Care
Cut the lawn a bit shorter in Fall, which will help the ground dry out more quickly the following Spring. However, don't cut the grass shorter than the recommended range.
In the North, you can apply fertilizer any time in the Fall. This is also a good time to aerate the soil, which allow water and air to enter the ground more readily.
Close Lawn Observation
Is your lawn in sporting condition?
Despite your best efforts early in the season, the lawn may still have summer problems. Here are some common ones and ways to handle them.
Weeds: When weeds are obvious as you scan the lawn, they are a problem. It's still possible to remove any weed -- such as broadleaf dandelions, clover, and chickweed, as well as grass weeds including crabgrass and annual bluegrass -- by hand. For larger areas (not the whole lawn), spot-treat any problem with natural weed killers.
Irregular brown patches: Pieces of lawn that come up easily are symptoms of grubs -- the larval stage of beetles that eat grass roots. Pull up a section of grass and examine the soil for white larvae. If you see larvae, spike the soil 2 inches deep in early fall, or kill grubs with special products sold at nurseries.
Moss: Compacted, shaded acidic soil with drainage problems is ripe for a moss takeover. Rake out moss as soon as you find it or apply a moss-killer sold at nurseries. Reseed bare spots in fall or put in sod in spring or fall.
Other strange patterns or brown-yellow spots: It's extremely difficult to diagnose whether a lawn's problem is a disease, an insect, a certain weed, or the next-door neighbor's dog visiting your lawn. Take a 2x2-inch plug of grass and soil to a local nursery and ask the staff to identify the problem and the treatment. Examine the entire lawn so you can describe any unusual patterns or colours.
Excerpt taken from http:www.bhg.com
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