Honeybees often feed through these holes and thus carry out no pollen in the process. Flowers with short corollas are more easily pollinated than those with longer corollas. Some attribute the consistent fruit set of Bluecrop to its shorter corolla, and the poor set of Earliblue to its longer corolla. Cultivars also vary in their ability to attract pollinators. Earliblue, Stanley, and Coville are relatively unattractive to bees, whereas Rubel and Rancocas are more attractive.
Evidence suggests that attractive cultivars produce more nectar than others.
Honeybees are not as efficient as bumblebees in pollinating blueberry flowers. They forage less when the temperatures are cool, the day is overcast, or the wind speed is high. Compared to wild bees and bumblebees, honeybees begin flying later in the morning and return to their hives earlier in the evening. Wild bees do not maintain much energy reserve in their nests, so must work for their food every day. Maintaining dense native plantings along the perimeter of a planting will encourage nesting by wild bees and aid with pollination.