Aster (plant)
Aster is a common name used for several flowering plants in the daisy family (Asteraceae), especially showy, late-season perennials with star-like flower heads.
Aster is a common name for several flowering plants in the daisy family, known for their star-like, late-season blooms. These perennials are valued for attracting pollinators when many other plants have finished flowering.
What it is
Asters are herbaceous perennials with daisy-like composite flower heads, typically in blue, purple, pink, violet, or white with yellow or dark centres. Modern classification has moved many North American species formerly in the genus *Aster* to related genera like *Symphyotrichum* and *Eurybia*, but the common name persists.
Why it matters
Asters bloom from late summer into late fall, providing crucial nectar and pollen for butterflies, bees, and other pollinators when few other flowers are available. They are widely cultivated as ornamental perennials for autumn colour in gardens and landscapes, especially in temperate regions.
Key details
The name comes from the Greek word for 'star,' referring to the flower head shape. Asters are native to North America, Europe, and Asia. Canadian gardeners and wildflower enthusiasts appreciate them for their late-season display and pollinator support.
In short
- Asters bloom late summer to fall, extending the garden season.
- Their flower heads are composite, with ray florets around a central disk.
- They are important nectar sources for pollinators like bees and butterflies.
- The name 'aster' means 'star' in Greek.
Asters are familiar to Canadian gardeners and wildflower enthusiasts, and several native North American species occur in Canada. Canadian sources also note their value in autumn landscapes and for pollinators.
Quick questions
What is an aster?
Are all plants called asters in the same genus?
When do asters bloom?
Sources
- Encyclopaedia Britannica — https://www.britannica.com/plant/aster-plantSupports: Defines aster as a common term for fall-blooming leafy-stemmed herbaceous plants in the Asteraceae family.
- Canadian Wildlife Federation — https://prod.cwf-fcf.org/en/resources/encyclopedias/flora/aster.htmlSupports: Describes asters as late-summer to late-fall bloomers with composite flower heads and pollinator value.
- Chicago Botanic Garden — https://www.chicagobotanic.org/plant-information/plant-profiles/asterSupports: Explains the Greek etymology, daisy-family placement, flower shape, colours, and pollinator attraction.
- North Carolina Extension Gardener Plant Toolbox — https://plants.ces.ncsu.edu/plants/aster/Supports: Notes modern reclassification of the genus, North American species moving to other genera, and general growth and flowering traits.
- University of Wisconsin Horticulture — https://hort.extension.wisc.edu/articles/asters/Supports: States asters are perennial Asteraceae plants that bloom late in the year in daisy-like colours and vary in size.