Why does asparagus make urine smell Are there any other Garden Asparagus might cause a unique odor within your pee. It is commonly known that eating this verdant plant can cause a powerful aroma while visiting the bathroom. If you see an offensive odor following a delicious dish containing asparagus, do not be alarmed. It is merely a natural reaction that occurs within the body. Be reassured that the odor is harmless and will diminish gradually.