If you want to celebrate FarmVille's second year of birth, it's gonna' cost ya. The Birthday Cake Crop has been released to FarmVille, and it costs Farm Cash to plant it. In order to plant the five-stage crop, you will need to buy a week-long permit for 10 Farm Cash. Pay up the digital bills, and you can throw down as many cakes as your sweet little heart desires ... for a week. Hey, at least the crop has a Mastery rating and has Bushels, which leads us to believe Zynga has more in store for the crop.