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As the heat becomes more intense, water becomes critical to you and your
plants. Adjust your watering times to provide adequate water without wasting
this precious resource.
If your lawn has a significant slope, look at the water flow pattern
at least once a month. Adjust the clock on your automatic sprinkler system
to make sure you don’t water to the point of runoff. Water pouring
sown the gutter doesn’t do a thing to make your grass grown. Try
watering for two shorter intervals an hour or two apart to get the needed
water penetration. On a level lawn, aim for a water schedule of one-half
to one hour once a week with the water going sown 6 to 10 inches and thus
encouraging a deep root system for your grass.
Lawns should be aerated (cored/drilled) once a year preferably in April
but any time is better than not at all. The device used for aerating should
remove a plug about one-half inch in diameter and at least 3 inches long.
These plugs should be raked up and composted or disposed of. Do not,
under any circumstances, make holes in your lawn with spike shoes.
These shoes with nail-like protrusions make holes but wedge the soil around
themselves making it even more difficult for water to penetrate. A one-quarter
inch ‘top-dressing’ of Gold Rush
or Bumper Crop will help fill the holes with
porous organic matter and will stimulate growth of the lawn. The use of
gypsum on an established lawn is of questionable value.
Lightly fertilizing the lawn once a month will keep it green and fresh
looking. If your leave the grass clippings on the lawn, you can reduce
your fertilizer usage by 30 to 50 percent. This will not increase thatch
which is a mixture of roots and stems.
Lawns should also be dethatched manually or by machine every two years
to facilitate water penetration. Lawn care professionals recommend against
using fertilizers which contain only Nitrogen such as sulphate of ammonia
of Urea. Instead, use a fertilizer which contains high Nitrogen plus some
potassium and phosphorus. Ideally, for the Bay Area, the fertilizer will
also contain some sulfur and iron.
An ideal spring treatment would be to: dethatch, aerate, fertilize, top
dress and then water thoroughly. This treatment will provide maximum water
penetration for the following year and stimulate an immediate greening
of the lawn.
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