Winter and early spring are lean times for honeybees as they emerge from their hives, where food supplies are dwindling, to forage. Adding clusters of winter-blooming plants around the yard will give them much needed nourishment.
Bees take in carbohydrates from floral nectar and protein from floral pollen. Being aware of bloom times and providing flowers that overlap the seasons are important for beekeepers who want to successfully overwinter their colonies.
Some bees, including many wild varieties, begin searching for food when sunny days push temperatures up to 55 degrees Fahrenheit or more.
Via:: Home and Garden