I’m burying 4” solid PVC drain pipe (not a French drain) in my yard for downspout & surface drainage. How deep should the pipes be buried in order to ensure that grass will grow above it?

Due to a limited amount of drainage fall on my property, in a certain section I may need to bury the pipe close to the surface (1-2”), and I fear that will mean I’ll end up with a strip of brown grass right where the pipe is.

  • 2
    As long as dirt is surrounding the pipe, the grass roots will grow around the pipe.
    – Gunner
    Commented May 27, 2021 at 2:14
  • 1
    you can raise the grass around the pipe if needed by slowly adding sand+soil, about 1/4" a month.
    – dandavis
    Commented May 27, 2021 at 7:17

1 Answer 1


One to two inches of soil above the pipe should be plenty. I often get significant stands of grass growing in the soil that accumulates along the edges of my sidewalk if I don't keep up with edging it. And that's often a half inch or less.

And as Gunner says in the comments, with a 4" diameter pipe, the grass roots will have no problem working their way around the pipe to find deeper soil to put down some good roots.

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