Instructions
Go to any city in "Digimon World: Dawn" and purchase farm goods from the shops there. There are dozens of different farm goods to purchase that can raise all of your Digimon's stats, including HP, spirit, strength, speed and the different types of experience, such as holy, dark and aquan.
Read the descriptions included with the farm goods to determine what they will do for your Digimon. Purchase the farm goods you want to install at your Digifarm and go back to the Tamer Home.
Walk to the desk in the Tamer Home and access the Digifarm PC. This is the PC with the blue square in front of it. Start the PC to see the Digifarm screen. Go to Farm Island, which brings up another screen.
Go to the Digifarm where you want to train your Digimon. You start out with one, but you can purchase additional farms at the shops in cities. Go to the "Digimon" menu and go to "Training" mode. From here, you can install the farm goods you purchased and pick which Digimon you want to leave at the farm.
Leave your Digimon and the farm goods at the Digifarm so they can train. While away from Digifarm, you can check on your Digimon's progress by accessing the Digifarm Reports that you can find in the main menu when you pause the game. Go back and speak with your Digimon every so often to keep your Friendship Level high. Pick up your Digimon when you are done training them.