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Glaucous Michaelmas Daisy

Aster laevis

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Plant Profile

Flowering Months:
Asteraceae (Daisy)
Also in this family:
Alpine Blue Sow-thistle, Alpine Cotula, Alpine Fleabane, Alpine Saw-wort, Annual Ragweed, Annual Sunflower, Argentine Fleabane, Autumn Hawkbit, Autumn Oxeye, Beaked Hawksbeard, Beggarticks, Bilbao Fleabane, Black Knapweed, Black-eyed Susan, Blanketflower, Blue Fleabane, Blue Globe-thistle, Bristly Oxtongue, Broad-leaved Cudweed, Broad-leaved Ragwort, Brown Knapweed, Butterbur, Buttonweed, Cabbage Thistle, Canadian Fleabane, Canadian Goldenrod, Carline Thistle, Chalk Knapweed, Chamois Ragwort, Changing Michaelmas Daisy, Chicory, Chinese Mugwort, Chinese Ragwort, Coltsfoot, Common Blue Sow-thistle, Common Cat's-ear, Common Cudweed, Common Daisy, Common Dandelion, Common Fleabane, Common Goldenrod, Common Groundsel, Common Michaelmas Daisy, Common Mugwort, Common Ragwort, Common Wormwood, Coneflower, Confused Michaelmas Daisy, Corn Chamomile, Corn Marigold, Cornflower, Cotton Thistle, Cottonweed, Creeping Thistle, Daisy Bush, Dwarf Cudweed, Dwarf Thistle, Early Goldenrod, Eastern Groundsel, Eastern Leopardsbane, Elecampane, English Hawkweed, Fen Ragwort, Feverfew, Field Fleawort, Field Wormwood, Fox and Cubs, French Tarragon, Gallant Soldier, Garden Lettuce, Giant Butterbur, Glabrous-headed Hawkweed, Glandular Globe-thistle, Globe Artichoke, Globe-thistle, Goat's Beard, Golden Ragwort, Golden Samphire, Goldilocks Aster, Grass-leaved Goldenrod, Great Lettuce, Greater Burdock, Greater Knapweed, Grey-headed Hawkweed, Guernsey Fleabane, Hairless Blue Sow-thistle, Hairless Leptinella, Hairy Michaelmas Daisy, Harpur Crewe's Leopardsbane, Hawkweed Oxtongue, Heath Cudweed, Heath Groundsel, Hemp Agrimony, Highland Cudweed, Hoary Mugwort, Hoary Ragwort, Hybrid Knapweed, Intermediate Burdock, Irish Fleabane, Jersey Cudweed, Jerusalem Artichoke, Lance-leaved Hawkweed, Lavender-cotton, Leafless Hawksbeard, Least Lettuce, Leopardplant, Leopardsbane, Leptinella, Lesser Burdock, Lesser Hawkbit, Lesser Sunflower, London Bur-marigold, Magellan Ragwort, Marsh Cudweed, Marsh Hawksbeard, Marsh Ragwort, Marsh Sow-thistle, Marsh Thistle, Meadow Thistle, Melancholy Thistle, Mexican Fleabane, Milk Thistle, Mountain Everlasting, Mouse-ear Hawkweed, Musk Thistle, Narrow-leaved Cudweed, Narrow-leaved Hawkweed, Narrow-leaved Michaelmas Daisy, Narrow-leaved Ragwort, New England Hawkweed, New Zealand Holly, Nipplewort, Nodding Bur-marigold, Northern Hawksbeard, Norwegian Mugwort, Oxeye Daisy, Oxford Ragwort, Pearly Everlasting, Perennial Cornflower, Perennial Ragweed, Perennial Sow-thistle, Perennial Sunflower, Pineapple Mayweed, Plantain-leaved Leopardsbane, Ploughman's Spikenard, Plymouth Thistle, Pontic Blue Sow-thistle, Pot Marigold, Prickly Lettuce, Prickly Sow-thistle, Purple Coltsfoot, Rayed Tansy, Red Star Thistle, Red-seeded Dandelion, Red-tipped Cudweed, Robin's Plantain, Roman Chamomile, Rough Cocklebur, Rough Hawkbit, Rough Hawksbeard, Russian Lettuce, Safflower, Salsify, Saw-wort, Scented Mayweed, Scentless Mayweed, Sea Aster, Sea Mayweed, Sea Wormwood, Seaside Daisy, Shaggy Mouse-ear Hawkweed, Shaggy Soldier, Shasta Daisy, Shetland Mouse-ear Hawkweed, Shrub Ragwort, Sicilian Chamomile, Silver Ragwort, Slender Mugwort, Slender Thistle, Small Cudweed, Small Fleabane, Smooth Cat's-ear, Smooth Hawksbeard, Smooth Sow-thistle, Sneezeweed, Sneezewort, Spear Thistle, Spotted Cat's-ear, Spotted Hawkweed, Sticky Groundsel, Stinking Chamomile, Stinking Hawksbeard, Tall Fleabane, Tall Mouse-ear Hawkweed, Tansy, Thin-leaved Sunflower, Treasureflower, Trifid Bur-marigold, Tuberous Thistle, Tyneside Leopardplant, Viper's Grass, Wall Lettuce, Welsh Groundsel, Welted Thistle, White African Daisy, White Butterbur, White Buttons, Willdenow's Leopardsbane, Winter Heliotrope, Wood Burdock, Wood Ragwort, Woody Fleabane, Woolly Thistle, Yarrow, Yellow Chamomile, Yellow Fox and Cubs, Yellow Oxeye, Yellow Star Thistle, Yellow Thistle, York Groundsel
Life Cycle:
Maximum Size:
120 centimetres tall
Fields, gardens, grassland, meadows, roadsides, rocky places, wasteland, woodland.

Variable in colour, many petals
Flowers appear in clusters and range from dark blue to purple. The 19 to 33 disc florets are borne yellow, later turning purplish with age. Flowers measure about 1 inch (2.5cm) across.
The fruit is an achene. The achene is bristly at the end. The seeds are spread by the wind.
The Glaucous Michaelmas Daisy has variable leaves which alternate up the stem on both sides. The shape of the leaf varies from oval to lance-shaped. Leaves measure up to 8 inches (20cm) long and 1 inch (2.5cm) wide. The leaves are hairless and sometimes can be sharp-toothed. Perennial.
Other Names:
Glaucous Aster, Smooth Aster, Smooth Blue Aster, Smooth-leaved Aster.
Frequency (UK):
Rarely seen  

Similar Species

Other Information


Aster laevis, also known as smooth aster or smooth blue aster, is a species of perennial wildflower in the Asteraceae family. It is native to North America, found in a variety of habitats, including meadows, prairies, and open woods. The plant typically grows to a height of 2-4 feet and produces showy, daisy-like flowers with yellow or white centers and blue or purple petals. The leaves are smooth and glossy, and they are arranged alternately on the stem. It blooms from late summer to fall, and its flowers are attractive to butterflies, bees and other pollinators. This species of aster is often used in gardens and landscaping for its attractive flowers and it's also used in wildflower seed mixtures for the restoration of native habitats. It is tolerant of dry soils and can be a good choice for xeriscaping.


Glaucous Michaelmas Daisy, scientifically known as Aster laevis, is a beautiful and hardy flowering plant native to North America. It is a member of the Asteraceae family and is popularly cultivated for its attractive blooms, which last from late summer until fall. In this blog, we will discuss the characteristics, growing conditions, and benefits of this stunning plant.


Glaucous Michaelmas Daisy is a perennial plant that can grow up to 4 feet tall and 3 feet wide. It has narrow, lance-shaped leaves that are greenish-gray in color and slightly hairy. The plant produces clusters of small, daisy-like flowers that can range in color from pale lavender to deep blue-purple. The flowers are typically 1-2 inches wide and bloom in late summer to early fall, attracting pollinators such as bees and butterflies.

Growing Conditions

Glaucous Michaelmas Daisy is a hardy plant that can grow in a variety of soil types, including clay, loam, and sand. It prefers full sun to partial shade and thrives in moist, well-draining soil. The plant is tolerant of drought and can survive in dry conditions, but it may require additional watering during hot and dry periods.

The plant is relatively easy to care for and requires minimal maintenance. It is generally disease and pest resistant and does not require regular fertilization. However, deadheading the spent flowers can help promote new growth and prolong the bloom period.


Glaucous Michaelmas Daisy is a valuable addition to any garden or landscape for several reasons. First, it is a beautiful and eye-catching plant that adds color and interest to any space. The flowers attract pollinators, which can help support local ecosystems and promote biodiversity.

Second, the plant is drought-tolerant and can survive in a variety of growing conditions, making it an ideal choice for low-maintenance gardens or landscapes. Additionally, it is relatively disease and pest resistant, meaning it requires little effort to keep it healthy and thriving.

Finally, Glaucous Michaelmas Daisy is a long-blooming plant that can add interest and color to the garden during the late summer and fall months when other plants may be fading. Its hardiness and adaptability make it a reliable and attractive addition to any garden or landscape.

In conclusion, Glaucous Michaelmas Daisy is a beautiful and hardy plant that is easy to grow and maintain. Its attractive blooms and long blooming period make it a valuable addition to any garden or landscape, and its ability to attract pollinators and thrive in a variety of conditions make it a versatile and low-maintenance choice for gardeners of all skill levels.

Additional Information

Glaucous Michaelmas Daisy is also known for its medicinal properties. The plant contains compounds that have been shown to have anti-inflammatory and analgesic effects, making it useful for treating conditions such as arthritis and other inflammatory disorders. The plant has also been used traditionally in herbal medicine to treat respiratory ailments such as coughs and bronchitis.

In addition to its medicinal properties, Glaucous Michaelmas Daisy is also a valuable plant for wildlife. The flowers provide nectar and pollen for a variety of pollinators, including bees, butterflies, and hummingbirds. The plant also provides shelter and habitat for small animals and insects.

Glaucous Michaelmas Daisy is a popular choice for gardeners looking to attract pollinators to their gardens. The plant is known to be particularly attractive to monarch butterflies, which rely on native plants for their survival. By planting Glaucous Michaelmas Daisy and other native plants in your garden, you can help support local ecosystems and promote biodiversity.

Glaucous Michaelmas Daisy is also a great plant for cut flower arrangements. The long-lasting blooms make an excellent addition to bouquets and floral displays, and the plant is easy to grow in a cutting garden. With its attractive flowers and hardiness, Glaucous Michaelmas Daisy is a reliable and versatile choice for gardeners looking to add interest and color to their floral arrangements.

In terms of propagation, Glaucous Michaelmas Daisy can be easily propagated through division in the spring or fall. Simply dig up the plant and separate the root ball into smaller sections, making sure that each section has some roots and foliage. Replant the divisions in a well-draining soil, and water them regularly until they are established.

Another interesting fact about Glaucous Michaelmas Daisy is that it has a long history of use in Native American traditional medicine. The plant was used by several tribes to treat a variety of ailments, including digestive disorders, skin conditions, and respiratory illnesses.

The Cherokee tribe, in particular, used a decoction of Glaucous Michaelmas Daisy roots to treat gastrointestinal issues, such as dysentery and diarrhea. They also used the plant to make a poultice to treat skin infections and wounds.

The plant was also used by the Iroquois tribe to treat coughs, colds, and other respiratory ailments. They would prepare a tea from the plant's leaves and drink it to help alleviate symptoms.

Today, Glaucous Michaelmas Daisy is still used in herbal medicine for its anti-inflammatory and analgesic properties. The plant is also believed to have antibacterial and antifungal properties, making it useful for treating infections and other ailments.

In addition to its medicinal uses, Glaucous Michaelmas Daisy is also used in the cosmetic industry. The plant contains compounds that are believed to have anti-aging effects and can help promote healthy skin.

Overall, Glaucous Michaelmas Daisy is a fascinating and versatile plant that has been used for centuries for its medicinal properties. Whether you're looking to treat a specific ailment, support local ecosystems, or simply add some color and interest to your garden, Glaucous Michaelmas Daisy is an excellent choice. With its hardiness, adaptability, and many uses, this plant is sure to be a valuable addition to any garden or landscape.

Distribution Map

Reproduced by kind permission of the BSBI.

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