The Fruitful Cider Mill is a special production building released during the 2017 Fall Event. It can be obtained by using the Cider Mill Upgrade on the Blooming Cider Mill. It can be upgraded further to the Bountiful Cider Mill. Cider Mill Upgrades are rewarded by completing the 2nd and 3rd Fall Event Questlines, and by winning the Grand Prize in the Fall Event. The Grand Prize starts at 1000 Apples and increases for each Grand Prize you achieve.