The flowers of Borage (Borago officinalis) are manna for bees. It is reckoned that a Borage flower refills with nectar every few minutes.
 B. officinalis is generally described on seed packets as a hardy annual; often as not it will indeed grow and bloom and die within the space of a single year. But I have noticed that some plants overwinter and last at least a year or two forming much larger specimens with particularly coarse and bristly stems and leaves.