The Grass tile helps nearby City, Town, Farm and Outpost tiles grow. When destroyed, a Grass tile becomes a Dirt tile.
Grass tiles are created at the start of the game. They can also be created from a Forest tile, by destroying all trees on the tile. At the start of each Spring season, grass tiles have a 25% percent chance to gain a tree, thus turning into a Forest tile.
At the end of the game, each Grass tile is worth 1 point to the winner.