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Where I am, sod is almost always blends of KY Bluegrass. It does not tolerate shade, is slower to green up, and likes to drink.
The negative with the sod is that it requires a lot of watering earlier on. What seems to happen is that the roots never establish themselves deep because the water is most available near the surface. It also develops an extensive thatch layer rather quickly. With that shallow root zone it is not tolerant to any lack of water.
The benefit is instant lawn, instant covering of soil to prevent erosion, and a blanket to supress weeds. Now you are fighting weeds in a mature crop.
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