Honeybees do not sonicate blueberry flowers and rarely collect much blueberry pollen. Carpenter bees can be a problem during pollination as they pierce holes in flowers during nectar collection. 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.