You can get the Mushrooms trait in Dungeon Village 2 in your city by Chewy Mushroom, taming Mush-Roo or Shrood as pets and hosting event Mushroom Picking. Worth 25 points, Mushroom Picking is the most points for acquiring the Mushrooms trait.
The Mushrooms trait is a requirement for two titles, including Mushroom Colony and Veggie Village.
The precise contribution of points for each factor in the Mushrooms trait is listed below.