Mark existing bulbs with grape hyacinths

Every fall, I add more bulbs and perennials to my garden. Most of the bulbs I planted in other years are invisible in fall, lying dormant underground. I avoid slicing into them accidentally by growing grape hyacinths (Muscari armeniacum), whose leaves emerge in fall, as markers around existing plantings. (There are other Muscari species commonly called grape hyacinths, but only the M. armeniacum is green in fall.)