Erigeron glabellus (Erigeron subtrinervis)

Photo: Andrey Zharkikh from Salt Lake City, USACC BY 2.0via Wikimedia Commonsresized / cropped

Erigeron glabellus Plant Care

Erigeron subtrinervis Rydb. ex Porter & Britton

Updated · Sources · How we source care data

Erigeron subtrinervis, called the three-nerved daisy, the three-nerve fleabane, or the hairy showy daisy, is a North American species of flowering plants in the family Asteraceae. It grows in various mountains of western Canada and the western United States: Rocky Mountains, northern Cascades, Black Hills, etc., from British Columbia and Washington state east to North Dakota and south as far as New Mexico.

🌱Herbs🌼Perennials🌻Annuals
Water

Every 7–10 days

Light

Full sun to partial shade

Temp

50–75°F

Humidity

40–60%

At a glance

How do you care for Erigeron glabellus?

Plant Erigeron glabellus in full sun to partial shade (USDA zones 12a) and water a young shrub every 7–10 days until it is established. It tolerates temperatures of 50–75°F (10–24°C). Fertilize it every 6 months during the growing season.

What Is the Erigeron glabellus?

Erigeron glabellus (Erigeron subtrinervis) belongs to the Asteraceae family within the Erigeron genus. Erigeron glabellus is also known as Erigeron speciosus.

Erigeron glabellus displays a low rosette, spreading growth habit, reaching up to 0.5 ft tall with a spread of approximately 1 ft. Erigeron glabellus produces daisy-like flowers in shades of pink, purple, or white.

Leaf size: approximately 2 inches.

How Often Should You Water a Erigeron glabellus?

Water a young or newly planted Erigeron glabellus every 7–10 days, soaking the whole root zone, until it is established — usually one to two growing seasons. Established shrubs mainly need water during long dry spells. In a container, water whenever the top few centimetres of soil are dry.

Watering Frequency

Every 7–10 days

Until established; then in dry spells

What Light Does the Erigeron glabellus Need?

Erigeron glabellus thrives in full sun to partial shade.

Light Requirement

Full sun to partial shade

What Temperature and Humidity Does the Erigeron glabellus Prefer?

Erigeron subtrinervis tolerates temperatures of 50–75°F. Erigeron glabellus prefers humidity levels of 40–60%.

Temperature

50–75°F

Humidity

40–60%

What Soil Mix Works Best for a Erigeron glabellus?

Well-draining sandy loam with added organic matter. Good drainage is essential for Erigeron glabellus to prevent waterlogging, which leads to root rot and fungal issues.

How Often Should You Fertilize a Erigeron glabellus?

Feed Erigeron glabellus every 6 months during the growing season with a balanced, slow-release fertilizer at the rate on the label. Established shrubs in good soil often need little extra feeding, so let weak growth or pale foliage guide you.

Stop feeding by late summer so new growth can harden before winter.

Fertilizing

Every 6 months

During the growing season

The PlantoScan app can remind you when to water and when to fertilize each plant.

Where Should You Plant a Erigeron glabellus?

Choose a spot with full sun to partial shade and well-draining sandy loam with added organic matter. Avoid low spots where water collects after rain.

Erigeron glabellus is suited to USDA Zone 12a.

Plant container-grown or balled-and-burlapped shrubs in spring or early autumn, setting the root flare at soil level, and water well after planting.

How Far Apart Should You Plant a Erigeron glabellus?

Erigeron glabellus can spread to about 1 ft (0.3 m) and reach about 1 ft (0 m) tall. Space plants about 1 ft (0.3 m) apart so mature crowns don't crowd each other, and plant at least half that distance from buildings, fences and paths.

Planning a row or hedge? Try the plant spacing calculator.

How Do You Prune a Erigeron glabellus?

Prune Erigeron glabellus while it is dormant in late winter: first remove dead, damaged and crossing branches, then thin lightly for shape.

If it flowers in spring, prune right after flowering instead so you don't remove next year's buds. Never take off more than about a quarter of the shrub in one year.

How Do You Care for a Erigeron glabellus in Winter?

Erigeron glabellus is frost-tender (hardy to USDA zone 12). In colder areas grow it in a container and move it to a bright, frost-free place before the first frost.

How Do You Propagate a Erigeron glabellus?

Erigeron glabellus can be propagated through seeds, division of clumps. Similar propagation techniques also apply to canadian fleabane plant care, which shares the same genus.

Is the Erigeron glabellus Toxic to Pets and Children?

Pet safety not verified

The ASPCA does not list Erigeron glabellus, 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 Erigeron glabellus?

Erigeron glabellus 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 Erigeron glabellus Need?

Erigeron glabellus grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. In cooler regions, grow Erigeron glabellus as a houseplant or bring it indoors before the first frost.

Hardiness Zone

Zone 12a

Keep exploring plants

Erigeron glabellus 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 Erigeron genus — compare its care with other Erigeron species on PlantoScan.

Erigeron is part of the Asteraceae plant family — browse all Asteraceae genera and species.

Erigeron glabellus thrives in bright light and direct sun — see other bright-light plants.

More Erigeron Species

Other Erigeron species in PlantoScan's care catalogue share similar watering, light, and soil preferences:

Sources

  • Scientific name & taxonomy: Erigeron subtrinervis Rydb. ex Porter & Britton, family Asteraceae (first published in Mem. Torrey Bot. Club 5: 328 (1894)) — World Flora Online record, IPNI name record.
  • Pet toxicity: Pet safety not verified: the ASPCA does not list Erigeron glabellus, 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: Andrey Zharkikh from Salt Lake City, USA, CC BY 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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