A queen bee is the only female who is reproductive in a hive of honey bees. She is also the most important thing in a hive. If you find your hive is not performing as it should be or it has become aggressive, it will need to be re-queened. Re-queening your hive will prevent swarming and keep the hive more placid. This is because, young queens help the colony repopulate as well as they help keep disease and pests out. A good beekeeping practice is to re-queen every year and the best time to get one is around October.