Salmon River Fleabane Plant Care
Erigeron salmonensis Brunsfeld & G.L.Nesom
Updated · Sources · How we source care data
Erigeron salmonensis is a rare North American species of flowering plant in the family Asteraceae known by the common name Salmon River fleabane. It has been found only in the Salmon River Canyon in central Idaho.
Every 7–10 days
Full sun to partial shade
50–75°F
40–60%
At a glance
How do you care for Salmon River Fleabane?
Plant Salmon River Fleabane 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 Salmon River Fleabane?
Salmon River Fleabane (Erigeron salmonensis) belongs to the Asteraceae family within the Erigeron genus.
Salmon River Fleabane displays a low rosette, spreading growth habit, reaching up to 0.5 ft tall with a spread of approximately 1 ft. Salmon River Fleabane produces daisy-like flowers in shades of pink, purple, or white.
Leaf size: approximately 2 inches.
How Often Should You Water a Salmon River Fleabane?
Water a young or newly planted Salmon River Fleabane 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 Salmon River Fleabane Need?
Salmon River Fleabane thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Salmon River Fleabane Prefer?
Erigeron salmonensis tolerates temperatures of 50–75°F. Salmon River Fleabane prefers humidity levels of 40–60%.
Temperature
50–75°F
Humidity
40–60%
What Soil Mix Works Best for a Salmon River Fleabane?
Well-draining sandy loam with added organic matter. Good drainage is essential for Salmon River Fleabane to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Salmon River Fleabane?
Feed Salmon River Fleabane 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 Salmon River Fleabane?
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.
Salmon River Fleabane 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 Salmon River Fleabane?
Salmon River Fleabane 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 Salmon River Fleabane?
Prune Salmon River Fleabane 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 Salmon River Fleabane in Winter?
Salmon River Fleabane 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 Salmon River Fleabane?
Salmon River Fleabane 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 Salmon River Fleabane Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Salmon River Fleabane, 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 Salmon River Fleabane?
Salmon River Fleabane 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 Salmon River Fleabane Need?
Salmon River Fleabane grows outdoors in USDA Zone 12a. It survives winters down to planting zone 12a. In cooler regions, grow Salmon River Fleabane as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 12a
Keep exploring plants
Salmon River Fleabane 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.
Salmon River Fleabane 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 salmonensis Brunsfeld & G.L.Nesom, family Asteraceae (first published in Brittonia 41: 424, fig. 1 (1989)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Salmon River Fleabane, 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.
- 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.
