After unlocking Zen Garden and reaching level 200, players can purchase the Money Tree to earn Coins for a limited amount of time! When you first unlock the Money Tree, it will harvest 24 Coins every 24 hours for 7 days, along with a chance to win boosters. Be sure to collect your Coins every day! Once a Money Tree expires, it can be renewed for periods of 30 days for $4.99 USD by tapping the sapling in Zen Garden.