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Symphyotrichum lanceolatum
Also called Panicled Aster, Tall White Aster, Eastern Line Aster, Lance Leaf Aster, Michaelmas Daisy, Narrow Leaf Michaelmas Daisy, Narrow Leaved Michaelmas Daisy
White panicle aster is a tall, rhizome-spreading perennial native to eastern North America, grown for its late-summer and autumn sprays of small white flowers. The key to growing it is giving it full sun and room to spread, as it forms large colonies.
Symphyotrichum lanceolatum (formerly Aster lanceolatus and Aster simplex) is a species of flowering plant in the family Asteraceae native to North America. Common names include panicled aster, lance-leaved aster, and white panicled aster. It is a perennial, herbaceous plant that may reach 1.5 meters (5 feet) tall or more, sometimes approaching 2 m (6+1⁄2 ft). The lance-shaped leaves are generally hairless but may feel slightly rough to the touch on the top because of tiny bristles. S. lanceolatum blooms July to October. The flowers grow in clusters and branch in panicles. They have 16–50 white ray florets that are up to 14 millimeters (1⁄2 inch) long and sometimes tinged pink or purple. The flower centers consist of disk florets that begin as yellow and become purple as they mature.
In its native range, Symphyotrichum lanceolatum may be a minor weed in agricultural fields. In addition to dispersal by wind-blown seed, it spreads extensively by rhizomes to create large clonal colonies. Although these clones do not dominate habitats in North America, growing in association with grasses, goldenrods, and other asters, in Europe it is an invasive species that excludes native plants in riparian habitats. This invasiveness has been linked to allelopathic compounds in S. lanceolatum tissue and their effects on native European plants. Viable seed production in Europe seems to be limited, and the species largely spreads there via rhizomes.
Common blue wood aster · Rice button aster · White heath aster · Short-rayed alkali aster · Smooth blue aster · Calico aster · New England aster · New York aster · Hairy white oldfield aster · Smooth violet prairie aster · Aster
Text excerpted from the Wikipedia article Symphyotrichum lanceolatum by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
