Co-op farming is newly introduced feature by zynga . Players whp reached level 20 and above can begin a task. When ever a task is started the player can posts to recruit neighbor to participate, players can participate completeing tasks at level 1.Here there are 3 levels of achievement for each task, Bronze, Silver, and Gold. Each level has a constraint on time to complete, the faster one is completed the higher the rewards. Here we can find ribbons which can only be achieved with co-op farming, see the ribbons table for more details. When the Gold level is completed you also receive a limited edition gift.