Black Rose is a limited edition Halloween seed in FarmVille. It is available for a limited time, between October 29 and November 17, 2010. The Black Rose is unique in that its seeds must be acquired in packs of 20, either through gifts from neighbors, or for 2 Farm Cash.
The seeds can be harvested every eight hours for 100 coins during the limited availability. They also award 2 XP per plot.
Farm Trivia: Black roses are the perfect present for your favorite ghoul.
Harvesting Black Rose has a 5% chance of yielding Perfect Bunches, which can be used as a decoration. Black Rose lived up to 14 days in a perfect bunch and cannot be sold.