Why does asparagus make urine smell Are there any other Garden Asparagus can cause a unique smell within your urine. It is commonly known that ingesting this verdant plant can lead to a strong fragrance when you visit the bathroom. If you notice an offensive aroma once you've indulged containing asparagus, do not be alarmed. It is just a typical result that occurs internally. Feel confident that the smell is not dangerous and will go away over time.