Putting · Tip
How to Spot the Grain on a Green
Part of our putting programs for three-putts, reading greens. Build a program with it
Grain is the direction the grass grows. On some greens, especially Bermuda, it changes speed and break. Here's how to read it. Shiny grass usually means you're looking down-grain. Putts will run faster. Dull, darker grass usually means into the grain. Putts will be slower. Look at the edges of the hole too. A ragged side often shows which way the grass grows.
Step by step
- Look at the color and shine of the grass.
- Shiny means down-grain and faster.
- Dull and dark means into the grain and slower.
- Check for a ragged edge on the cup.
- Adjust speed and break.
Why it works
Grass blades lean in one direction. When you look along the lean, light reflects off the blades and the surface looks shiny, and the ball rolls with less resistance. When you look against the lean, the blades face you, the surface looks darker and duller, and the ball meets more resistance. Grain also pushes the ball sideways on a slow roll, so it affects break as well as speed.
Common mistakes
- You judge the color from only one spot, such as behind the ball.Look at the grass from behind the ball and from behind the hole, and note whether it looks shiny or dull along the whole line.
- You treat a ragged cup edge as proof without checking the grass around it.Use the cup edge to confirm what the color and shine already show, and see if the ragged side lines up with the grain direction you saw.
- You read the grain but do not change your speed or aim.Hit a little firmer into the grain and a little softer down-grain, and play slightly more break when the grain runs across your line.
How you'll know it's working
- Your first putt on a down-grain line finishes close to your planned distance instead of rolling well past the hole.
- Your uphill and into-the-grain putts stop on or past the hole rather than short.
- Your read of the grain agrees from two different viewing angles, and the ragged cup edge matches it.
Make it easier or harder
Easier: Practice on a green with an obvious grain, such as a Bermuda green, and read it in good light with the sun low.
Harder: Read the grain on a green with a subtle lean and in flat light, then hit putts across the grain and check how much it moves the ball.
Common questions
How do you tell which way the grain runs on a green?
Look for shiny grass, which usually means down-grain, and dull, darker grass, which usually means into the grain. Then check the cup edge, where a ragged side often shows which way the grass grows.
Does grain affect putts on all greens?
It matters most on greens such as Bermuda, where the blades are coarse and lean strongly. On many other greens it has little effect on speed or break.
