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To successfully sow your seeds,
see growing notes at the bottom of the page!
The flat-topped white aster (Doellingeria umbellata) is one of Quebec's most imposing asters, reaching up to 1.75 meters in height. Its long, sturdy stems end in dense clusters of white flowers with yellow centers, which appear from July to September. These flowers are particularly attractive to pollinators, including butterflies, bees, and other insects, who find an abundant source of nectar. Favorable to moist, well-drained soils, the flat-topped white aster thrives in cool environments, making it an ideal choice for shorelines, wetlands, and forest edges. Its generous bloom also makes it a valuable aesthetic and ecological addition to naturalized gardens.
In addition, asters (Symphyotrichum spp.) are recognized as keystone plants for biodiversity in many North American ecoregions, as they support a wide diversity of beneficial insects, caterpillars, and birds that use their flowers and seeds.
Sociability Index : 3 to 4 → Indicates the plant's behavior in space and its interactions with other plants.
Ecological Role
In Quebec's ecosystems, the flat-topped white aster plays an important role in supporting diverse biodiversity. Its flowers attract many pollinators in late season, providing nectar at a time when other resources are scarce. In addition, its preference for moist soils and its dense root system help prevent bank erosion, stabilizing soils and enriching the biodiversity of wetlands.
Flat-topped white aster seeds must undergo cold stratification to ensure germination. See growing notes below for more details.
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