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Sod Maintenance
(Recommendations from Turfgrass Producers International) What can I do to maintain a beautiful lawn?
Water
is essential to all life...too little water and we die, too much and we drown.
The same is true of the grass in our lawns. Water makes up 70% to 80% of the
weight of our lawn grasses and the clippings alone are nearly 90% water. While
most people are concerned about not watering their lawns enough, the fact is
that more lawns are damaged or destroyed by over-watering. Newly
installed turfgrass sod has very important watering needs. Proper watering
immediately after installation will ensure the turf gets established, and it
will also have an impact on how well the lawn continues to flourish for years
to come. WHEN To Water New Turfgrass Sod Begin
watering new turfgrass sod within a half hour after it is laid on the soil.
Apply at least 2 to 3 cm. (1 inch) of water so that the soil beneath the turf
is very wet. Ideally, the soil 7 to 10 cm. (3 to 4 inches) below the surface
should be moist. Watering Tip #1: pull back a corner of the turf and push a
screwdriver or other sharp tool into the soil. It should push in easily and
have moisture along the first 7 to 10 cm. (3 or 4 inches), or you need to apply
more water. Watering Tip #2: make absolutely certain that water is getting
to all areas of your new lawn, regardless of the type of sprinkling system you
use. Corners and edges are easily missed by many sprinklers and are
particularly vulnerable to drying out faster than the center portion of your
lawn. Also, areas near buildings dry-out faster because of reflected heat and
may require more water. Watering Tip #3: runoff may occur on some soils and sloped areas
before the soil is adequately moist. To conserve water and ensure adequate
soak-in, turn off the water when runoff begins, wait 30-minutes to an hour and
restart the watering on the same area, repeating this start and stop process,
until proper soil moisture is achieved. For
the next two weeks keep the below-turf soil surface moist with daily (or more
frequent) watering. Especially hot, dry or windy periods will necessitate
increased watering amounts and frequency. Watering Tip #4: as the turf starts to knit its new roots into
the soil, it will be difficult, impossible and/or harmful to pull back a corner
to check beneath the turf (Watering Tip #1), but you can still use a sharp tool
to check moisture depth by pushing it through the turf and into the soil. Watering Tip #5: water as early in the morning as possible to
take advantage of the daily start of the grass's normal growing cycle, usually
lower wind speeds and considerably less loss of water because of high
temperature evaporation. Watering Tip #6: if the temperature approaches 37( C (100( F),
or high winds are constant for more than half of the day, reduce the
temperature of the turf surface by lightly sprinkling (syringe) the area. This
sprinkling does not replace the need for longer, deeper watering, which will
become even more critical to continue during adverse weather conditions. During
the rest of the growing season most lawns will grow very well with a maximum
total of one inch of water a week, coming either from rain or applied water.
This amount of water, properly applied, is all that is required for the health
of the grass, providing it is applied evenly and saturates the underlying soil
to a depth of 10 to 15 cm (4 to 6 inches). Watering Tip #7: Infrequent and deep watering is preferred to
frequent and shallow watering because the roots will only grow as deeply as its
most frequently available water supply. Deeply rooted grass has a larger
"soil-water bank" to draw moisture from and this will help the grass
survive drought and hot weather that rapidly dries out the upper soil layer HOW To Water New Turfgrass Sod Proper
watering techniques are a critical aspect of lawn watering, equal in importance
to the issues of when to water and how much to water. Here are several key
factors to proper technique: Avoid
hand sprinkling because it cannot provide the necessary uniformity as most
people do not have the patience, time or "eye" to adequately measure
what is being applied across any larger areas of lawn. The only possible
exception to this guideline would be the need to syringe the surface of the
grass to cool it, or to provide additional water near buildings or other
heat-reflecting surfaces. Understand
the advantages of different sprinkler designs, because each type has its
advantages and disadvantages and its proper use will be determined by the type
of sprinkler you select. In-Ground
Systems require professional design and installation and they require routine
adjustments and regular maintenance to be most effective and efficient. The
greatest mistake made with most in-ground systems is the "set it and
forget it" philosophy that fails to account for the changing seasonal
water requirements to maximize turf grown or even allowing the system to
operate during or following a multi-inch rain storm. Another frequent problem
is when heads get out of alignment and apply water to the sidewalk, street or
house-siding, rather than to the lawn. Hose-End
Sprinklers range in complexity, cost and durability, but are highly portable
and can provide uniform and consistent coverage, when properly placed on the
yard and adequately maintained. Sprinklers
that do not throw the water high into the air are usually more efficient
because prevailing winds are less disruptive of distribution patterns, the
potential for evaporation loss is reduced and trees, shrubs and other plants do
not block the pattern (or are very noticeable if they do). Several
times during the growing/watering season, routine maintenance to check for
blocked outlets, leaking or missing gaskets, or mis-aligned sprinkler heads is
important, regardless of the sprinkler design. Select
sprinklers and systems for uniformity of coverage across whatever area they are
designed to water. Inexpensive hose-end sprinklers and in-ground irrigation
systems can provide uniform coverage, but they can also be extremely variable
and inconsistent in their coverage patterns. Verify
watering uniformity can be accomplished with a very simple and inexpensive
method that uses only 4 to 6 flat-bottomed, straight-sided cans (tuna fish, cat
food, etc.), a ruler and a watch. Follow these steps: Step #1: arrange the cans at random distances away from any
sprinkler, but all within the area you assume is being covered; Step #2: run the sprinkler for a specific amount of time, say a half-hour
OR run the water until a specific amount of water is in at least one can, say a
1.5 cm (0.5 inches) Step #3: measure the amount of water in each can, checking for uniformity.
Some variation is expected, but a difference of 10-percent or more between any
two cans must be addressed by replacing or adjusting the sprinkler or
relocating the system. This
measuring method should be used across an entire lawn that has an in-ground
irrigation system to assure maximum coverage and uniformity. Watering
difficult areas such as slopes and under trees requires some special attention
to achieve maximum benefit and a beautiful lawn. For
Slopes, see Watering Tip #3 For
Areas Under and Near Trees you need to know the water requirements for the
specific trees, as well as for the grass. Despite having deep
"anchor" roots, trees take up moisture and nutrients from the top six
inches of soil...the same area as the grass. Trees and turf will compete for
water. Watering sufficiently for the grass may over-water some varieties of
trees and under-water others. A common solution is to not plant grass under the
drip-line of trees, but rather use that area for perennial ground-covers,
flower beds or mulch beds. HOW MUCH Water Is Applied & Needed The
amount of water your lawn requires and receives will determine its overall
health, beauty and ability to withstand use and drought. Keep in mind that too
much water can ruin a lawn just as fast as too little. One
inch a week is the standard water requirement established for most lawns;
however, this will vary between different turf species and even among cultivars
within a specie. There will also be varying water requirements for seasonal
changes and still more differences brought about because of different soil
types. Look
at your lawn to determine its water needs. Grass in need of water will have a
grey-blue cast to it, rather than a blue-green or green color. Also, foot
prints will still appear after a half-hour or more on a lawn in need of water,
while on a well watered lawn foot-prints will completely disappear within
minutes. Use
a soil probe, such as a screwdriver or large spike to determine how dry your
lawn is. If the probe can be pushed into the soil easily, it's probably still
moist, but if it takes a lot of pressure to push in, it's time to water. Verify
watering quantities with the same measuring can method described above, except
you will want to note the time it takes for the cans to collect a specific
amount of water. For example, if 0.5 cm (0.25-inches) collects in 30 minutes,
you can easily calculate that it will take one hour to apply 1 cm (0.5-inches)
of water or two hours to apply 2.5 cm (1-inch). Water
timers can help provide consistency and even be programmed or set to turn-off
when no one is awake or at home. Some timers measure just the amount of time
water is flowing through the devise and you have to know or calculate how long to
set the timer for (see item above). Other units measure the number of gallons
of water flowing through it. Knowing that 600 gallons per 1,000 square feet
equals one-inch of water will help you calculate the timer settings your lawn
will require. How can I patch thin or dead areas?
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