Photo: Frank VincentzCC BY-SA 3.0via Wikimedia Commonsresized / cropped
Smooth Headed Aster Plant Care
Eucephalus glabratus Greene
Updated · Sources · How we source care data
Eucephalus glabratus is a North American species of flowering plant in the family Asteraceae with the common names of smooth aster, smooth wayside-aster, and Siskiyou aster. It is a perennial herb up to 60 centimeters (24 inches) tall, with branching rhizomes. Stems and leaves are hairless or nearly so. One plant will usually produce 3–8 flower heads per stem. Each head has 0–4 violet ray florets surrounding numerous yellow disc florets.
Every 7–10 days
Full sun to partial shade
50–80°F
40–70%
At a glance
How do you care for Smooth Headed Aster?
Water Smooth Headed Aster every 7–10 days, letting the top layer of soil dry out between waterings, and give it full sun to partial shade. It prefers temperatures of 50–80°F (10–27°C) and 40–70% humidity. Fertilize it every 6 months during the growing season.
What Is the Smooth Headed Aster?
Smooth Headed Aster (Eucephalus glabratus) belongs to the Asteraceae family within the Eucephalus genus. Smooth Headed Aster is also known as Eucephalus glabratus.
Smooth Headed Aster displays a clumping perennial herb growth habit, reaching up to 1.5 ft tall with a spread of approximately 1.5 ft. Smooth Headed Aster produces small daisy-like flowers in clusters of white, pink, or purple.
Leaf size: approximately 3 inches.
How Often Should You Water a Smooth Headed Aster?
Eucephalus glabratus requires watering every 7–10 days. Allow the top layer of soil to dry between waterings to prevent root rot. Reduce watering frequency during winter when growth slows.
Watering Frequency
Every 7–10 days
Let soil partially dry between waterings
What Light Does the Smooth Headed Aster Need?
Smooth Headed Aster thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Smooth Headed Aster Prefer?
Eucephalus glabratus grows best at temperatures of 50–80°F. Smooth Headed Aster prefers humidity levels of 40–70%.
Temperature
50–80°F
Humidity
40–70%
What Soil Mix Works Best for a Smooth Headed Aster?
Well-draining sandy loam with added organic matter. Good drainage is essential for Smooth Headed Aster to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Smooth Headed Aster?
Feed Smooth Headed Aster every 6 months during the growing season (spring and summer) with a balanced fertilizer diluted to the strength on the label.
Pause feeding in autumn and winter, when growth slows, and never fertilize dry soil — water first.
Fertilizing
Every 6 months
During the growing season
The PlantoScan app can remind you when to water and when to fertilize each plant.
How Do You Repot a Smooth Headed Aster?
Divide and repot every 2-3 years in early spring. Choose a pot one size larger than the current container, and ensure it has drainage holes to allow excess water to escape.
How Do You Propagate a Smooth Headed Aster?
Smooth Headed Aster can be propagated through seeds, division of clumps. Similar propagation techniques also apply to brewer's goldenrod plant care, which shares the same genus.
Is the Smooth Headed Aster Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Smooth Headed Aster, so we can't confirm whether it is safe for cats and dogs. Keep pets from chewing it as a precaution.
This is a general caution, not veterinary or medical advice. If your pet ate a plant, contact your vet or animal poison control.
See all plants toxic to cats and plants toxic to dogs.
What Pests and Diseases Affect the Smooth Headed Aster?
Smooth Headed Aster is susceptible to aphids, spider mites, leafhoppers. Inspect the foliage regularly, especially along leaf undersides and stems. Treat infestations promptly with insecticidal soap or neem oil to prevent spread.
Yellow leaves, brown tips or drooping? See common plant problems and how to fix them.
What USDA Hardiness Zone Does the Smooth Headed Aster Need?
Smooth Headed Aster grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. In cooler regions, grow Smooth Headed Aster as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 12a
Keep exploring plants
Smooth Headed Aster is one of many species covered in the complete plant care and identification guide, which groups plants by genus, attribute, and popularity.
It belongs to the Eucephalus genus — compare its care with other Eucephalus species on PlantoScan.
Eucephalus is part of the Asteraceae plant family — browse all Asteraceae genera and species.
Smooth Headed Aster thrives in bright light and direct sun — see other bright-light plants.
More Eucephalus Species
Other Eucephalus species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Eucephalus glabratus Greene, family Asteraceae (first published in Pittonia 3(14): 56 (1896)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Smooth Headed Aster, so we can't confirm whether it is safe for cats and dogs. Checked against the ASPCA plant list; any other toxicity note on this page comes from PlantoScan's plant database.
- Photo: Frank Vincentz, CC BY-SA 3.0, Wikimedia Commons — original.
- Hardiness zone: USDA Zone 12a, calculated from the plant's minimum temperature.
- Care values(watering, light, temperature, humidity, soil, fertilizing): PlantoScan's plant database, filtered by automatic plausibility checks — values that fail them are hidden. How we source and check plant data.
Spotted a mistake? Email info@upvision.media with the page link — we check and correct reported errors.
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