Photo: Joshua MayerCC BY-SA 2.0via Wikimedia Commonsresized / cropped
Tall Flat-topped White Aster Plant Care
Doellingeria umbellata (Mill.) Nees
Updated · Sources · How we source care data
Doellingeria umbellata, known by the common names tall flat-topped white aster, parasol whitetop, or tall white-aster, is a North American plant species in the family Asteraceae. It is native to Canada (from Alberta to Newfoundland), St. Pierre and Miquelon, and the eastern and north-central United States (from Nebraska and the Dakotas east to Maine and South to Mississippi, Georgia and the Florida Panhandle.
Every 7–10 days
Full sun to partial shade
50–80°F
40–70%
At a glance
How do you care for Tall Flat-topped White Aster?
Water Tall Flat-topped White 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.
Where Is the Tall Flat-topped White Aster Native To?
What Is the Tall Flat-topped White Aster?
Tall Flat-topped White Aster (Doellingeria umbellata) belongs to the Asteraceae family within the Doellingeria genus. Tall Flat-topped White Aster is native to Canada, St. Tall Flat-topped White Aster is also known as Flat-topped White Aster, Umbellate Aster, Aster amygdalinus.
Tall Flat-topped White Aster displays an upright, bushy perennial growth habit, reaching up to 2.5 ft tall with a spread of approximately 1.5 ft. Tall Flat-topped White Aster produces small daisy-like flowers in shades of purple, pink, or white.
Leaf size: approximately 4 inches.
How Often Should You Water a Tall Flat-topped White Aster?
Doellingeria umbellata 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 Tall Flat-topped White Aster Need?
Tall Flat-topped White Aster thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Tall Flat-topped White Aster Prefer?
Doellingeria umbellata grows best at temperatures of 50–80°F. Tall Flat-topped White Aster prefers humidity levels of 40–70%.
Temperature
50–80°F
Humidity
40–70%
What Soil Mix Works Best for a Tall Flat-topped White Aster?
Well-draining loamy soil with added organic matter for moisture retention. Good drainage is essential for Tall Flat-topped White Aster to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Tall Flat-topped White Aster?
Feed Tall Flat-topped White 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 Tall Flat-topped White Aster?
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 Tall Flat-topped White Aster?
Tall Flat-topped White Aster can be propagated through division, seeds. Similar propagation techniques also apply to whorled aster plant care, which shares the same genus.
Is the Tall Flat-topped White Aster Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Tall Flat-topped White 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 Tall Flat-topped White Aster?
Tall Flat-topped White Aster is susceptible to aphids, spider mites, powdery mildew. 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 Tall Flat-topped White Aster Need?
Tall Flat-topped White Aster grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. Tall Flat-topped White Aster is native to Canada, St. In cooler regions, grow Tall Flat-topped White Aster as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 12a
Keep exploring plants
Tall Flat-topped White 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 Doellingeria genus — compare its care with other Doellingeria species on PlantoScan.
Doellingeria is part of the Asteraceae plant family — browse all Asteraceae genera and species.
Tall Flat-topped White Aster thrives in bright light and direct sun — see other bright-light plants.
Related Plant Care Guides
Closely related plants with similar care requirements:
Sources
- Scientific name & taxonomy: Doellingeria umbellata (Mill.) Nees, family Asteraceae (first published in Gen. Sp. Aster. : 178 (1832)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Tall Flat-topped White 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: Joshua Mayer, CC BY-SA 2.0, 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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