Blue Eyed Grass Plant Care
Sisyrinchium angustifolium Mill.
Sisyrinchium angustifolium, commonly known as narrow-leaf blue-eyed-grass, is a herbaceous perennial growing from rhizomes, native to the eastern United States, stretching as far west as Texas and Kansas, where it is the most common blue-eyed grass. It is commonly cultivated as an ornamental.
Every 7–10 days
Full sun to partial shade
50–80°F
40–70%
What Is the Blue Eyed Grass?
Blue Eyed Grass (Sisyrinchium angustifolium) belongs to the Iridaceae family within the Sisyrinchium genus. Blue Eyed Grass is native to the eastern United States, stretching as far west as Texas and Kansas. Blue Eyed Grass is also known as Narrowleaf Blue-eyed Grass, Blue-eyed Grass.
Blue Eyed Grass displays a clumping perennial growth habit, reaching up to 1 inches tall with a spread of approximately 1 inches. 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 Blue Eyed Grass?
Sisyrinchium angustifolium 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 Blue Eyed Grass Need?
Blue Eyed Grass thrives in full sun to partial shade light conditions. The optimal light range is 200–1000 lux. Avoid placing Blue Eyed Grass in direct, harsh sunlight for extended periods, as this can scorch the foliage.
Light Requirement
Full sun to partial shade
200–1000 lux
What Temperature and Humidity Does the Blue Eyed Grass Prefer?
Sisyrinchium angustifolium grows best at temperatures between 50°F and 80°F. Blue Eyed Grass prefers humidity levels of 40–70%.
Temperature
50–80°F
Humidity
40–70%
What Soil Mix Works Best for a Blue Eyed Grass?
Well-draining sandy loam with added organic matter. Good drainage is essential for Blue Eyed Grass to prevent waterlogging, which leads to root rot and fungal issues.
How Do You Repot a 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 Blue Eyed Grass?
Blue Eyed Grass can be propagated through division of rhizomes, seeds.
Fertilizing
Every 6 months
During the growing season
Is the Blue Eyed Grass Toxic to Pets and Children?
Non-Toxic
Non-toxic to humans and pets
What Pests and Diseases Affect the Blue Eyed Grass?
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.
What USDA Hardiness Zone Does the Blue Eyed Grass Need?
Blue Eyed Grass grows outdoors in USDA Zone 12a. Native to the eastern United States, stretching as far west as Texas and Kansas, Blue Eyed Grass is adapted to warm climates. In cooler regions, grow Blue Eyed Grass as a houseplant or bring it indoors before the first frost.
Hardiness Zone
Zone 12a
Keep exploring plants
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.
Blue Eyed Grass tolerates low-light rooms and shaded spots — browse the full list of low-light plants.
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