What is a grain in golf?

Definition

The direction of grass growth on putting greens, significantly affecting ball roll speed and direction, requiring careful observation and adjustment in putting technique and green reading. Grain patterns vary based on grass type, sunlight, wind, and maintenance practices, creating subtle but important influences on putting performance. Understanding grain effects helps golfers read putts more accurately and adjust their putting strategy accordingly. Grain is particularly pronounced on certain grass types like Bermuda and can significantly affect putting outcomes. Professional golfers carefully observe grain patterns as part of their green reading process.