Photo: Chris HughesCC BY 4.0via iNaturalistresized / cropped
Rosulate blue-eyed grass Plant Care
Sisyrinchium rosulatum E.P.Bicknell
Updated · Sources · How we source care data
With its vibrant yellow flowers and grass-like leaves, this plant originating from South America is a standout in any garden. Plant collectors are drawn to Sisyrinchium rosulatum for its unique visual appeal and ability to attract pollinators with its colorful blooms.
Every 7–10 days
Full sun to partial shade
50–80°F
40–70%
At a glance
How do you care for Rosulate blue-eyed grass?
Water Rosulate blue-eyed grass 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 Rosulate blue-eyed grass Native To?
What Is the Rosulate blue-eyed grass?
Rosulate blue-eyed grass (Sisyrinchium rosulatum) belongs to the Iridaceae family within the Sisyrinchium genus. Rosulate blue-eyed grass is native to Mexico, Central America, and South America and widely naturalized else.
Rosulate blue-eyed grass displays a clumping perennial growth habit, reaching up to 1 ft tall with a spread of approximately 1 ft. Rosulate blue-eyed grass produces small, star-shaped flowers in shades of blue, purple, or yellow.
Leaf size: approximately 6 inches.
How Often Should You Water a Rosulate blue-eyed grass?
Sisyrinchium rosulatum 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 Rosulate blue-eyed grass Need?
Rosulate blue-eyed grass thrives in full sun to partial shade.
Light Requirement
Full sun to partial shade
What Temperature and Humidity Does the Rosulate blue-eyed grass Prefer?
Sisyrinchium rosulatum grows best at temperatures of 50–80°F. Rosulate blue-eyed grass prefers humidity levels of 40–70%.
Temperature
50–80°F
Humidity
40–70%
What Soil Mix Works Best for a Rosulate blue-eyed grass?
Well-draining sandy loam with added organic matter. Good drainage is essential for Rosulate blue-eyed grass to prevent waterlogging, which leads to root rot and fungal issues.
How Often Should You Fertilize a Rosulate blue-eyed grass?
Feed Rosulate blue-eyed grass 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 Rosulate blue-eyed grass?
Divide and 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 Rosulate blue-eyed grass?
Rosulate blue-eyed grass can be propagated through division of rhizomes, seeds. Similar propagation techniques also apply to bermuda blue-eyed grass plant care, which shares the same genus.
Is the Rosulate blue-eyed grass Toxic to Pets and Children?
Pet safety not verified
The ASPCA does not list Rosulate blue-eyed grass, 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 Rosulate blue-eyed grass?
Rosulate blue-eyed grass is susceptible to aphids, spider mites, thrips. 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 Rosulate blue-eyed grass Need?
Rosulate blue-eyed grass grows outdoors in USDA Zone 7a – 10b. It survives winters down to planting zone 7a. Rosulate blue-eyed grass is native to Mexico, Central America, and South America and widely naturalized else.
Hardiness Zone
Zone 7a – 10b
Keep exploring plants
Rosulate blue-eyed grass 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 Sisyrinchium genus — compare its care with other Sisyrinchium species on PlantoScan.
Sisyrinchium is part of the Iridaceae plant family — browse all Iridaceae genera and species.
Rosulate blue-eyed grass thrives in bright light and direct sun — see other bright-light plants.
More Sisyrinchium Species
Other Sisyrinchium species in PlantoScan's care catalogue share similar watering, light, and soil preferences:
Sources
- Scientific name & taxonomy: Sisyrinchium rosulatum E.P.Bicknell, family Iridaceae (first published in Bull. Torrey Bot. Club 26: 228 (1899)) — World Flora Online record, IPNI name record.
- Pet toxicity: Pet safety not verified: the ASPCA does not list Rosulate blue-eyed grass, 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: Chris Hughes, CC BY 4.0, iNaturalist — original.
- Hardiness zone: USDA Zone 7a – 10b, 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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