Harvest a Friend's Farm is a quest unlocked as soon as the player has completed Your First Harvest. It is necessary to have at least one friend in order to be able to complete the quest.
The player has to harvest from a friend's Farm two times in order to complete the quest.
Click on the [Farm] -> Select your friends, displayed on the right -> Harvest twice in any friend's farm. You can harvest crops on your friend's farms and still obtain small gains.
The player is rewarded 5.000 Gold.