Minecraft wiki entry for Bee, associated text: Bees that have pollen pollinate wheat, potatoes, carrots, beetroots, melon stems, pumpkin stems, berry bushes, and cave vines they fly over. When one of these plants gets pollinated, it advances to another growth stage, similar to using bone meal. To pollinate a plant, the particles that drop must touch it directly. A bee can fertilize plants 10 times each time they have pollen, and there is a short wait time between pollinating each plant.