TeckXKnight wrote:It spreads to forest tiles that are not within a certain radius of trees.
Actually, it's not exactly about radius. It seems that grass won't grow if there is a tree in particular minigrid. By minigrid I understand the 25x25 (or 20x20? not sure) square. Minimap (or this square made of purple lines visible on minimap in ender's client) is built of 5x5 minigrids.