Do Asters Smell?

Fragrant Aster

• Also known as aromatic aster and oblong-leaved aster (Symphyotrichum oblongifolium), the fragrant aster occurs naturally in open meadows and glades, along rocky slopes and cliffs and in other undisturbed sites. This plant is also grown as an ornamental in U.S. Department of Agriculture plant hardiness zones 3 through 8. Like other members of the sunflower family, this aster has a center disc that contains hundreds of yellow seed-bearing flowers, which is surrounded by rose or blue-colored ray petals. An excellent wildflower specimen and cutting flower, the hairy, narrow leaves of the aromatic aster release a strong, mintlike fragrance when bruised or brushed against. This aster not only has the distinction of being highly fragrant but is also the longest blooming species that typically flowers from July until frost.

Cultivars

• “October Skies” (Symphyotrichum oblongifolium "October Skies") is a slow-spreading compact variety of fragrant aster with flowers a shade of dark blue that is characteristic of sky color in October. Although the flowers are attractive to birds and butterflies, the dark green leaves are of interest because of the scent released when crushed. The slightly tacky leaves of "Raydon’s Favorite" (Symphyotrichum oblongifolium "Raydon’s Favorite") create a billowy appearance that makes the plant suitable for planting en mass for an informal, naturalized effect, while the deep purple ray flowers and yellow discs attract wildlife. "Dream of Beauty" (Symphyotrichum oblongifolium "Dream of Beauty") also has fragrant foliage but features pink ray flowers with orange discs. Like their parent plant, these cultivars grow best in USDA zones 3 through 8.

Culture

• Asters thrive in full to partial sun and are tolerant of poor soils, although moist, organically rich soil with good drainage is ideal. With a maximum height of up to 3 feet, Symphyotrichum asters are not very tall but the weight of the blooms sometimes requires physical support. Although pruning and fertilizing isn’t necessary, mulching will enhance moisture retention.

Pests and Diseases

• Fragrant asters are relatively problem-free, but they can be vulnerable to aphids, slugs, wilt and powdery mildew. "Raydon’s Favorite" seems to have greater resistance to powdery mildew than other varieties. In general, providing adequate drainage will help to deter mildew disease.