Bees may find some early blooming dandelions, although they do not provide a significant food supply. Early elm bloom is the primary food source. Elms provide some nectar but primarily supply pollen. February February rains will bring dandelions into full bloom. Mountain ash finishes blooming in Feb and by March is putting out leaves.
Early rains can force some of the ornamental fruits to flower.
Plums, pears, peaches and apples are not significant food sources in Austin, but can be in the Hill Country. March During March, the primary food sources in rural areas include the last of the elm, which provide some nectar, but primarily provide pollen, the same is true of the last of the Mountain Ash. BUT, its a good pollen source and the post oak that bloom in the area will be crawling with bees. Black Jack Oak also blooms during this time across Central Texas, and the bees readily work the yellow tassel. Oddly enough, the similar looking green tassel bloom of Pecans are not worked at all.