Sapphire Woolly Star Plant Care
Eriastrum sapphirinum (Eastw.) H.Mason
Updated · Sources · How we source care data
Eriastrum sapphirinum is a species of flowering plant in the phlox family known by the common name sapphire woollystar. This wildflower is endemic to California where it is found in many habitats throughout the state.
Full sun to partial shade
At a glance
How do you care for Sapphire Woolly Star?
Sapphire Woolly Star grows best in full sun to partial shade.
What Is the Sapphire Woolly Star?
Sapphire Woolly Star (Eriastrum sapphirinum) belongs to the Polemoniaceae family within the Eriastrum genus. Sapphire Woolly Star is native to many habitats throughout the state.
Sapphire Woolly Star displays a low rosette, spreading growth habit, reaching up to tall with a spread of approximately . Sapphire Woolly Star produces small, colorful tubular flowers in shades of blue, purple, or pink.
What Light Does the Sapphire Woolly Star Need?
Sapphire Woolly Star thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Soil Mix Works Best for a Sapphire Woolly Star?
Well-draining sandy soil mix with some organic matter. Good drainage is essential for Sapphire Woolly Star to prevent waterlogging, which leads to root rot and fungal issues.
How Do You Repot a Sapphire Woolly Star?
Repot every 1-2 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 Sapphire Woolly Star?
Sapphire Woolly Star can be propagated through seeds, division. Similar propagation techniques also apply to abrams' woolly star plant care, which shares the same genus.
Is the Sapphire Woolly Star Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Sapphire Woolly Star, 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 Sapphire Woolly Star?
Sapphire Woolly Star is susceptible to aphids, spider mites, whiteflies. 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.
Keep exploring plants
Sapphire Woolly Star 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 Eriastrum genus — compare its care with other Eriastrum species on PlantoScan.
Eriastrum is part of the Polemoniaceae plant family — browse all Polemoniaceae genera and species.
Sapphire Woolly Star thrives in bright light and direct sun — see other bright-light plants.
More Eriastrum Species
Other Eriastrum species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Eriastrum sapphirinum (Eastw.) H.Mason, family Polemoniaceae (first published in Madroño 8: 79 (1945)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Sapphire Woolly Star, 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.
- 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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