Grow mushrooms on your own Mushroom Farm! You can find it in the Farming section of the Store once you reach Level 63.
To grow mushrooms, first you'll need to produce substrate at the Feed Mill. Once you have enough substrate, follow these steps:
1. Tap the Mushroom Farm.
2. Tap and drag a sack of substrate from the bottom panel to any of the mushroom pots.
As soon as you build a Mushroom Farm, new mushroom goods will become available at your town factories.
Grow as many mushrooms as you can to unlock the Mushroom King achievement and earn some T-cash as a reward!