Bees bring in nectar (in their special nectar-storage stomach) and pollen (packed onto their leg 'baskets') based on what is abundantly blooming at a given time within 2-5 mile radius of their hive, regardless of whether their hive stays in one place or gets moved to specific crops or orchards.

You can often tell what kind of honey you are getting in a frame or super based on the color of the pollen packed into the cells at that time. Pollen can be white, yellow, orange, greenish, blue, lavender, red, etc, and it's the clue that tells you if the honey being made that week is mostly from a certain plant, tree, or flower. If there are many things in bloom at a particular time and the pollen is all mixed up, then it's often just called 'wildflower honey'.