Aster alpinus (Alpine aster) is an ornamental plant native to the mountains of Europe (including the Alps), with a subspecies native to Canada and the United States. It is a perennial forb having purple, pink or blue flowers belonging to the genus Aster. It grows to be about 6–12 inches (15–30 cm). The bloom color may be pink, violet-lavender, dark purple-black, or white-near white and may bloom in late spring or early summer or, occasionally, midsummer. In the UK this plant has gained the Royal Horticultural Society‘s Award of Garden Merit. It grows very slowly in clay, silt, loam, silty clay, sandy clay etc. types of soil. Its minimum pH scale is 6 and maximum pH scale is 7.5. It grows erectly in a ‘single crown’ form.