Crabgrass
Digitaria sanguinalis
Common Crabgrass
About this plant
Digitaria sanguinalis, commonly called crabgrass, is a fast-growing grass known for its spreading habit and ability to thrive in disturbed soils. It has coarse leaves and produces seed heads that resemble crab legs. Often considered a weed, it can quickly cover lawns or gardens if not managed. Despite this, it is drought-tolerant and can be used for erosion control in some areas.
Taxonomy
- Genus
- Digitaria
- Family
- Poaceae
- Higher classification
- Order Poales
- Plant type
- Annual
- Lifespan
- Annual
Origin & Distribution
- Native region
- Europe, Asia
- Distribution
- Widely distributed worldwide, especially in temperate and tropical regions including North America, Europe, Asia, and Africa.
Care
- Light preference
- Full sun
- Suitable locations
- Outdoor, Balcony
- Watering frequency
- Moderate
- Watering interval
- 3–7 days
- Humidity
- Normal
- Minimum
- -5 °C
- Maximum
- 35 °C
- Optimal
- 15-30 °C
- USDA hardiness zones
- 5-10
- Soil pH
- 6.0-7.5
- Soil type
- well-draining, poor to average soil
Watering. Water moderately; crabgrass is drought-tolerant but grows best with occasional watering during dry spells.
Fertilizing. Crabgrass generally does not require fertilizing and can grow in poor soils. If grown intentionally, a balanced fertilizer can be applied in spring to encourage growth.
Crabgrass is a tough, fast-growing grass that thrives in poor soil and sunny spots. It requires little care but can become invasive if not controlled. It grows quickly and spreads easily, so regular trimming or removal is needed to keep it in check.
Propagation
- Propagation methods
- Seeds
- Care difficulty
- Easy
Ornamental features
- Flowering
- Yes
- Flowering period
- summer
Coarse green leaves with distinctive spreading seed heads that look like crab legs.
Toxicity & Safety
- Toxic to humans
- Non-toxic
- Toxic to pets
- Non-toxic
- Weed potential
- Invasive
Crabgrass is non-toxic to humans and pets.
Allergy information
- Allergy risk
- Low
- Allergy triggers
- Pollen
- Pollen level
- Moderate
Digitaria sanguinalis, also known as crabgrass, can produce pollen that may cause mild allergic reactions in sensitive individuals, especially during its flowering season. People with grass pollen allergies might experience sneezing or itchy eyes. To reduce exposure, avoid areas with dense crabgrass during peak pollen times and keep windows closed if pollen levels are high.
Common problems
Crabgrass can become invasive and crowd out other plants. It may also die back in cold or very dry conditions. Overwatering can cause fungal issues, but generally, it is hardy and low-maintenance.
Uses
Primarily considered a weed, crabgrass can be used for erosion control and as forage in some regions.
Notes
Regular mowing or pulling is recommended to prevent crabgrass from overtaking lawns or garden beds. It can be sensitive to cold winters and may die back in frost-prone areas.