Photo: Matt Lavin from Bozeman, Montana, USACC BY-SA 2.0via Wikimedia Commonsresized / cropped
Sickleleaf aster Plant Care
Symphyotrichum falcatum (Lindl.) G.L.Nesom
Updated · Sources · How we source care data
This plant's distinct feature is its lance-shaped leaves that are lined with serrated edges. Originating from North America, Symphyotrichum falcatum is highly sought after by plant collectors for its stunning clusters of lavender-pink flowers that bloom in late summer, adding a pop of color to any garden.
Every 7–10 days
Full sun to partial shade
50–80°F
40–70%
At a glance
How do you care for Sickleleaf aster?
Water Sickleleaf 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 Sickleleaf aster Native To?
What Is the Sickleleaf aster?
Sickleleaf aster (Symphyotrichum falcatum) belongs to the Asteraceae family within the Symphyotrichum genus. Sickleleaf aster is native to a widespread area of central and western North America. Sickleleaf aster is also known as Prairie aster, Aster elegantulus, Aster falcatus.
Sickleleaf aster displays an upright, bushy perennial growth habit, reaching up to 3 ft tall with a spread of approximately 2 ft. Sickleleaf aster produces daisy-like flowers in various colors like purple, blue, pink, and white.
Leaf size: approximately 4 inches.
How Often Should You Water a Sickleleaf aster?
Symphyotrichum falcatum 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 Sickleleaf aster Need?
Sickleleaf aster thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Sickleleaf aster Prefer?
Symphyotrichum falcatum grows best at temperatures of 50–80°F. Sickleleaf aster prefers humidity levels of 40–70%.
Temperature
50–80°F
Humidity
40–70%
What Soil Mix Works Best for a Sickleleaf aster?
Well-draining loamy soil with added compost for nutrients. Good drainage is essential for Sickleleaf aster to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Sickleleaf aster?
Feed Sickleleaf 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 Sickleleaf 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 Sickleleaf aster?
Sickleleaf aster can be propagated through division, stem cuttings. Similar propagation techniques also apply to pineywoods aster plant care, which shares the same genus.
Is the Sickleleaf aster Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Sickleleaf 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 Sickleleaf aster?
Sickleleaf 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 Sickleleaf aster Need?
Sickleleaf aster grows outdoors in USDA Zone 3a – 8b. It survives winters down to planting zone 3a. Sickleleaf aster is native to a widespread area of central and western North America.
Hardiness Zone
Zone 3a – 8b
Keep exploring plants
Sickleleaf 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 Symphyotrichum genus — compare its care with other Symphyotrichum species on PlantoScan.
Symphyotrichum is part of the Asteraceae plant family — browse all Asteraceae genera and species.
Sickleleaf aster thrives in bright light and direct sun — see other bright-light plants.
More Symphyotrichum Species
Other Symphyotrichum species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Symphyotrichum falcatum (Lindl.) G.L.Nesom, family Asteraceae (first published in Phytologia 77: 281. 1995 [31 Jan 1995]) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Sickleleaf 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: Matt Lavin from Bozeman, Montana, USA, CC BY-SA 2.0, Wikimedia Commons — original.
- Hardiness zone: USDA Zone 3a – 8b, estimated from the plant's typical growing conditions.
- 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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