There are many varieties of rabbiteye blueberries. Planting two or more varieties for cross-pollination ensures fruit set and earlier ripening.
Blooming intervals of most varieties overlap enough to ensure adequate cross-pollination.
Early-Season Rabbiteye Blueberries
Mid- to Late-Season Rabbiteye Blueberries
Source: Mississippi State University Cooperative Extension Service Fruit and Nut Review: Blueberries