Knot-grass (Digitaria nodosa)
Care, watering, light and tips for Knot-grass on Floravia.
Quick facts
- Family: Poaceae
- Difficulty: Moderate care
- Watering: every 7 days
- Light: Partial shade
- Temperature: 10–30 °C
About Knot-grass
Digitaria nodosa, commonly known as knotty crabgrass, is a low-growing, spreading perennial grass with creeping stems that root at the nodes. Its bright green, lanceolate leaves form a dense and attractive mat. It is ideal for low-maintenance gardens, slope stabilization, or as ground cover in coastal and dry areas.
Native range
Coastal regions of tropical and subtropical Africa, including the Mediterranean and Red Sea
Care tips
This species thrives in full sun but tolerates some partial shade, being very drought-tolerant once established. It prefers well-drained soils, even sandy or nutrient-poor ones. Watering should be moderate, allowing the substrate to dry out between waterings to prevent waterlogging, which is its main enemy. Avoid excessive fertilization, as it can promote weak growth and susceptibility to diseases.
How to save a dying Knot-grass
- Warning signs
- Yellowish or brown leaves, stunted growth, soft stems.
- First aid
- Ensure good drainage, reduce watering, expose to full sun. Remove damaged parts.
- What kills it
- Overwatering and lack of direct sunlight. It does not tolerate shade.
- Can it be saved?
- Yes, if overwatering is quickly corrected and it gets enough sun.