Install guide

Site prep and soil prep before laying Bermuda sod

General guidance for commercial landscapers, not a site-specific recommendation and not professional advice. Soil, irrigation, slope, and weather change the job. When a detail matters, check the sources below, your county extension office, and the grower supplying the sod.

Sod dies on a hard, dry, or puddled bed faster than it dies from a bad roll. AgriLife says sod survives best on well-prepared soil that is relatively moist, and points site prep to its establishment publication. Do this work before the truck is on the way. Sod should be installed within about 36 hours of harvest, less when it is hot, so the bed has to be ready when it arrives.

Clear and grade

• Remove old turf you are replacing, construction trash, and rock that will sit in the surface. The Lawn Institute suggests checking the edges of the site for anything that will block sun, water, or mowers.
• Grade so water moves away from buildings. AgriLife describes a fall of about 6 inches over 40 to 50 feet as adequate where topsoil depth is not the problem, and says not to dump extra water onto a neighbor. Oklahoma State University Extension describes at least about a 1% slope away from buildings. Fill low spots that will hold water. Do not invent a drain plan for a site that needs an engineer; say so and stop.
• If you have to cut the grade deeply, AgriLife's establishment guidance is to stockpile the topsoil and spread it back, rather than leaving the sod on raw subsoil. A deep, uncompacted soil is preferred; AgriLife mentions a soil depth of about 10 to 12 inches where that is realistic. Many North Texas and Oklahoma sites will not have that. Do not haul in mystery fill and call it topsoil. To size an order, use the topsoil and amendment calculator.

Soil test, then amend

The Lawn Institute says a soil test is the reliable way to know nutrients and pH, and that labs take days or weeks, so sample before you till. Send the sample through your county Texas A&M AgriLife Extension office or your Oklahoma Cooperative Extension office and follow the lab, not a bag rate from memory.

Work lime or fertilizer into the soil only as the soil test says, before the sod goes down, so it is in the root zone rather than sitting on top. OSU's lawn-establishment guidance is to correct phosphorus, potassium, and lime in the prepared soil rather than hoping a surface application fixes a bad bed. This guide does not give a nitrogen rate. Rates depend on the test, the soil, and whether the grass is going in during active growth or near dormancy.

Clay holds water and compacts. Very sandy soil does not hold water. The Lawn Institute says both can be helped by mixing in organic matter or a decent topsoil, spread evenly and mixed in, not left as a layer that roots will refuse to cross. Tilling about 4 to 6 inches is the practice The Lawn Institute cites for deeper rooting and better survival in drought. Tilling is not always possible next to utilities, trees, or fresh concrete. Where you cannot till, core aeration and raking still open the surface more than doing nothing.

Firm, then loosen the top

A fluffy bed settles and the sod ends up in a hole. OSU says the bed should be firm enough to walk on, with about the top half inch loose. If a footprint is deeper than about half an inch, roll or water the bed and grade again. If the surface has crusted hard, rough it lightly. The Lawn Institute makes the same point: after tilling, firm the surface so foot traffic does not leave deep prints.

OSU says not to sod, sprig, or plug into dry soil, and to water the bed several inches deep a few days ahead of planting so it is moist but not soupy when the sod arrives. AgriLife's install page says to rake lightly just before you lay sod.

Before the truck arrives

• Water source works, and you know which zones cover the new sod.
• The unload spot is firm and close enough that crews are not dragging pallets across the finished grade.
• You are ready to lay the same day. Stacked sod heats. In hot weather, The Lawn Institute says to keep unlaid pallets in the shade until they are planted.

Hybrid Bermuda such as Tifway 419 is planted from sod or sprigs, not from seed. Prep the bed for vegetative sod. The job form currently passes Tifway 419 Bermuda only.

Sources

• Texas A&M AgriLife Extension, Turfgrass Establishment for Texas (SCSC-PU-079) — preferred rooting depth, grading away from structures, and not sending water onto neighbors.
• Texas A&M AgriLife Extension, How to Select and Install Sod (SCSC-PU-125) — sod does best on prepared soil that is relatively moist; install within 36 hours of harvest.
• The Lawn Institute, Proper Planting — soil test before tilling in amendments; tilling about 4–6 inches; slope away from buildings; firm the surface.
• Oklahoma State University Extension, Establishing a Lawn in Oklahoma — about a 1% slope away from buildings; a firm bed with a loose surface; do not sod into dry soil.