Golf grass is not all the same and, as they say, the devil is in the details. This is especially true when it comes to grass for a putting green.
1: Grass can interfere with the game of golf. Not all grass is soft nor does it grow straight. Some grass types branch or have thick root systems which cause thatch to build up. Thatch can cause golf balls to veer off course, which does nothing to help your putting game.
2: Not all grass can be cut short. Most grasses are long blade grasses, which means that they must have longer grass blades for photosynthesis to occur. If you cut these long blade grasses short, they die because they cannot process incoming solar radiation and make food. They also turn brown and are not the rich, lush green color of healthy grass.
3: Not all grass can stand up to the wear and tear of a putting green. There is a lot of foot traffic around a putting green. Not all grasses can stand up to that much traffic. Choosing a durable grass can help keep your putting green in top shape. Choosing the right grass can help your putting green stay playable.
Consult with an expert about which grass or sod products you should use for your putting green.