The putting green is the most technically engineered surface on a golf course. It must drain quickly, resist disease, grow slowly, and roll smoothly under all weather conditions — all simultaneously.

The USGA has published a green construction specification used by courses worldwide since 1960. It specifies a layered construction: a drainage layer of gravel at the bottom, a coarse sand intermediate layer, and a fine sand root zone at the top. This engineered profile — 12 inches deep — drains up to 30 times faster than natural soil.

Green slopes are carefully designed by the architect to create interesting putting situations without being unfair. The maximum slope on a competition green is typically around 3-4% — enough to create significant break on long putts but not so steep that short putts become impossible.

The putting surface grass — typically bentgrass in cooler climates, bermudagrass in warmer climates — is selected specifically for its ability to grow short and dense, creating the fast, smooth surface that golfers expect.