Question: Does it make any difference if your potatoes bloom or if the buds just fall off?
Answer: Typically potato vines begin to blossom at the same time as the underground tubers begin to form, and that is our signal to steal a few new potatoes from the edges of the patch. However, not every potato vine blooms, and there is usually no difference in yield. It is normal for some flower buds to fall off. Other buds will open, be visited by bees or other pollinating insects, then close up and fall off. Is it possible that some of the buds you see falling are actually spent flowers? That's just a thought. At any rate, whether or not your potato vines bloom is not an indicator of a problem. As long as you are getting a satisfactory harvest, it's nothing to worry about (unless you are hoping to produce potato seed).