Rosemary is a perennial evergreen shrub in warmer growing zones. Plants can grow 4 to 6 feet tall with some varieties having a trailing or cascading habit. Foliage is dark green and needle-like and grow opposite each other in closely-spaced pairs much like a spruce or fir. The leaves are dark green above and ashy-white below, the white band on the underside giving it a gray coloration. During the summer, rosemary produces small white, pink or blue flowers. Being in the mint family, the flower resembles flowers of basil and mint. The fragrance is an intense camphor or piney scent.