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Annual Blue-Eyed Grass
Also known as: Annual Blueeyed Grass
Annual Blue-Eyed Grass (Sisyrinchium rosulatum) is a winter annual plant that is considered a lawn weed. It blooms in spring with tiny white or yellow flowers with purple-lined yellow throats. It produces an abundance of seeds after blooming is finished, which disperse and spread quickly.
Scientific classification
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Herb
Plant Type
Late spring, Early summer
Bloom Time
30 cm
Plant Height
30 cm to 90 cm
Spread
Green
Leaf Color
8 mm to 1 cm
Flower Size
Black
Fruit Color
White, Purple, Yellow, Blue, Red
Flower Color
Green
Stem Color
Summer dormancy
Dormancy
Evergreen
Leaf type

Images of Annual Blue-Eyed Grass

Distribution of Annual Blue-Eyed Grass

Distribution Map
Annual Blue-Eyed Grass is native to North America, particularly in the region encompassing Mexico. It has spread beyond its native range and is now introduced to various countries across continents including Asia, Europe, and Oceania. Additionally, annual Blue-Eyed Grass adapts well under cultivation, which has facilitated its spread to non-native regions.
Native
Cultivated
Invasive
Introduced
No species reported
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Habitat
Dry coastal plains
Hemisphere Trend Curve

Culture

Symbolism
Psychic powers, Protection. It symbolizes food, concealment and hardiness.
Interesting Facts
The annual Blue-Eyed Grass is a weed that can be difficult to eliminate. Once established, simple hand-pulling techniques will often prove futile in the fight to eradicate this weed. In most cases the use of a weed treatment or professional company many be needed to properly rid your lawn of this nuisance.
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Toxicity

Annual Blue-Eyed Grass is toxic to humans, cats, and dogs upon ingestion. Symptoms may include gastrointestinal distress and irritation. The entire plant is toxic, requiring vigilance to prevent accidental consumption and ensure prompt treatment if symptoms occur.
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RELATED: Toxicity of Annual Blue-Eyed Grass

Care Guide for Annual Blue-Eyed Grass

Every 1-2 weeks
Water
Full sun
Sunlight
20 - 38 ℃
Ideal Temperature
Garden Soil
Soil Type
Water: Originating from variable moisture environments, annual Blue-Eyed Grass thrives with a moderate watering schedule of once every 1-2 weeks, requiring evenly moist soil. Predominantly outdoors, it aligns with temperate climates, benefiting from balanced wet and dry seasons while enduring brief periods of dryness.
Fertilize: Annual Blue-Eyed Grass thrives with high phosphorus fertilization to enhance flowering, applying a balanced fertilizer monthly during spring and summer. Use a teaspoon per plant, reducing frequency in cooler months, and water thoroughly after application to prevent root burn. Moderation is crucial to protect the root system.
Pruning: Annual Blue-Eyed Grass features delicate blue flowers and grass-like leaves. Prune in early to late spring to promote health, avoiding heavy cuts during flowering. Regularly trim dead leaves and shear back to ground level for new growth. Use clean, sharp tools to prevent damage.
Propagation: Annual Blue-Eyed Grass is a delicate perennial that flourishes through sowing in well-draining soil. Seeds should be thinly spread and lightly covered for moisture retention. Consistent warmth and humidity are vital, while avoiding waterlogging. Handle seedlings gently during thinning and transplanting to prevent damage.
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