Crops are grown for gold and XP.
Growing and Fertilizing Crops[]
To grow crops, build a farm using the Shop menu. Then, click on the hand icon to open the crop list.
Each crop has a different grow time. This is also the amount of time it will be available for harvest after it's grown. Example: strawberries take one minute to grow. You will have one minute to harvest them before they rot and must be cleared. Hint: In the crop list, click plant all to automatically plant crops in all open farms. This will not allow you to cancel the crop while they are growing, though.
Drag and hold clouds over crops to fertilize them. This doesn't affect grow time or increase rewards, but it does make a cute little rainbow over the crops.
To care for a friends crops, click any crop without care hearts above it. You can also refresh rotten crops.
See: Care