The fragrance of the Rose of Sharon would best be described as "tea-rose", a not-too-sweet, light, floral scent, which does not overpower.
This biblical flower from the region of Sharon in Israel is actually not a rose, but is part of the hibiscus family. Its blooms are radiantly beautiful and glorious, just as Isaiah depicted the Bride of Messiah would be in the millennia reign - Shining forth in all the radiance of her heavenly glory and beauty.
Song of Sol 2:1: "I am the rose of Sharon, the lily of the valleys."
Anointing your cherished loved ones and friends with oil is an act of consecration, a setting apart of people, places and things for God's special purposes, making them Holy unto the Lord.