Key Points:
·
Soil conditioning is just as important for sodding
as for seeding.
·
Lay sod immediately after delivery, keep moist until sod is knitted.
·
Cool hot surfaces before laying sod with water on a hot day.
·
Determine a straight line to start the first course and refer to this
line to keep sod lined up straight.
·
Use good seed; sow in two directions and mulch very lightly.
·
Keep new lawns moist, not wet until grass seed is established.
In recent years, establishing
lawns by sodding has become popular.
Sodding is desirable
where complete cover is needed
immediately and on steep slopes.
Specialized turf farms produce
sod of
several turfgrass species.
Sodding costs more than seeding but
results in an “instant” lawn. The real
advantage is that customers needn’t face the problems and time involved in turf
establishment – the sod producer and landscape installer do that for them. The grass in the sod field should be freshly
mowed and weed free.
Soil Preparation
Careful soil preparation is
the key to a quality, long lived, healthy lawn.
A sodded lawn requires the same soil
preparation as a seeded lawn. Areas to
be sodded or seeded should have phosphorous and potash tilled into the soil.
Special attention should be made
to avoid the common interface when topsoil is placed on top of the existing
soil and sod or seed is then planted.
The area to be seeded or sodded should be thoroughly rototilled as deep as
possible. Clean up any rocks uncovered
and other debris. If topsoil is needed,
spread one half over the site and rototill in with 2 to 3 inches of organic
material. If no topsoil is needed just
till the 2 to 3 inches of compost into the existing previously tilled soil.
Establish your final grade
after removing rocks turned up by rototilling a second time. Use a steel rake for this final grading. In a large area a piece of chain link fence
or wooden drag can be
helpful in leveling. Take your time to
get proper drainage away from the house, smooth out high and low spots. Once lawn is in, grade is difficult to
change. Add the last one half of topsoil
(if needed) and spread evenly without changing the grade just established. This process of rototilling, adding compost,
adding topsoil, rototilling and finishing with this final topsoil will provide
a nice transition between the original soil and topsoil additions. Simply placing 2 to 3 inches of topsoil over
the existing topsoil will create two
distinct layers (old soil/new soil) which affects water infiltration and deep
rooting.
Sod can be applied any time
the ground isn’t frozen, however, sufficient water is critical. For sodding during hot, dry periods, you’ll
need irrigation equipment capable of keeping the sod continually moist. The best times to seed are spring or fall.
Steps for Laying Sod
1. Lay sod immediately – don’t
allow it to remain stacked and rolled for more than two days, and then only
when absolutely necessary. Take care to
protect it from sun.
2. Lay sod on moistened
soil. Stagger the joints and fit the
pieces as closely together as possible.
Lay sod lengthwise across slopes.
Use short wooden pegs spaced one foot apart to anchor sod on a slope.
3. Soak the turf immediately
after laying the sod and water it daily (unless it rains) until the sod is firmly
rooted into the soil (2 to 3 weeks).
Once the turf is established, treat the sodded area as you would any
established lawn.
Steps for Seeding
1. Sow the seed in two
directions at right angles to each other.
Apply correct amount of seed as directed on seed package. Use certified seed for our cool season
turfgrass zone: bluegrass, perennial
rye, turf type tall fescue or red fescue.
2. Lightly rake the seed in and
roll lightly.
3. Add a very thin (1/4” or
less) layer of mulch over new seeds.
This will hasten germination by keeping soil moist and protect new
seedlings. The mulch cover should be
thin enough to expose the seeds to light which they require for germination.
4. Water thoroughly. Improper watering causes more failures in a
newly seeded lawn than any other one factor.
The top 2 inches must stay constantly moist. Soak thoroughly after seeding and then as
many as three or four light sprinklings per day. More watering may be required if it is hot
and windy.
5. Seeding is done in spring or
fall until September 15th.
Usually, the fall is the most favorable time. Seeding can be successful during the warmer
summer if irrigation is carefully monitored.