Clasping Aster grows in rocky or sandy open woods and thickets, and the graceful arc of its stems gives away its preference for a certain openness in the canopy. It reaches 2 to 3 feet tall and about 2 feet wide, with leaves that clasp the stem at the base, a distinctive feature that gives the plant one of its common names. The fragrant blue-purple blooms open in August, after the main flush of summer asters has passed, and carry on through October.

This late-season bloom timing is the plant's strongest argument for inclusion in a pollinator garden: butterflies and bees that have already exhausted other nectar sources find it still going. Plant it in full sun or light shade in medium to dry, well-drained sandy soil. Its high drought and salt tolerance make it a good fit for coastal gardens and exposed dry borders. The front of a woodland edge planting or a cottage garden path suits its naturally spreading habit well. Zones 4 to 8.