I cannot think of a better title given the shades of meaning for the word rose. The rose is most often thought of as a symbol for love in which case Homer is the "rose" or love for Emily. However, there is another meaning of rose to consider. In Medieval times the rose was used as a sign of silence or secrecy. A rose was hung from the ceiling at a meeting of secret societies indicating a demand for discretion. The rose in the title of the story could therefore stand for Emily's secret; that is Homer her "rose" whom she cherished, loved and kept to herself even after his body was corrupted by the decay of time.