Knotgrass (Paspalum distichum)

Knotgrass

Also known as: Seaside millet, Couch paspalum, Knotroot paspalum, Mercergrass

Paspalum distichum, also known as knotgrass, is found in most continents in the world and so the native range is obscure. The plant is a food source for the long-tailed widowbird and other avian species.

Scientific classification

Species

Knotgrass (Paspalum distichum)

Grasses, sedges and allies

Instantly identify plants with a snap

Snap a photo for instant plant ID, gaining quick insights on disease prevention, treatment, toxicity, care, uses, and symbolism, etc.

Download the App for Free

Perennial

Lifespan

Herb

Plant Type

Spring, Summer, Fall

Bloom Time

Semi-evergreen

Leaf type

15 - 35 ℃

Ideal Temperature

Spring, Summer, Fall

Growth Season

Rapid

Growth Rate

Images of Knotgrass

Attributes of Knotgrass

Growth Rate

During its active growth period spread over spring, summer, and fall, knotgrass exhibits a rapid growth rate. This rapid speed enables sudden expansion of foliage, accelerated height gain, and quick flowering. Visible growth patterns include dense clumping, owing to the frequent shoot emergence. In autumn, growth may reduce slightly but still maintains a brisk pace, contributing to the plant's invasive nature. This poses significant challenges for control efforts in landscapes and habitats.

Distribution of Knotgrass

Distribution Map

Knotgrass bears a widespread presence across continents. It is native to large regions in both South and North America, thriving in varied environments. Beyond its native ranges, knotgrass has taken root in parts of Europe, Asia, Africa, and Oceania. In some regions, it is sometimes thought to be establishing itself in ways that may have an impact on local ecosystems, particularly in areas with a mild climate. Despite its adaptive nature and capacity to spread, the extent to which knotgrass disrupts native systems is cautiously noted.

Native

Cultivated

Invasive

Introduced

No species reported

Discover plant distribution and habitat

Gain insights into where plants thrive and how they adapt, helping you identify, cultivate, and protect them with essential information on habitats, distribution maps, and climate trends.

Download the App for Free

Habitat

Riparian areas

Hemisphere Trend Curve

Northern

Sorthern

Care Guide for Knotgrass

Every week

Water

Full sun

Sunlight

15 - 35 ℃

Ideal Temperature

Water: Adapted to moist environments, knotgrass prefers consistently hydrated, evenly moist soil and is moderately drought-tolerant. Water weekly to maintain optimal moisture. Typically grown outdoors, knotgrass thrives in well-draining soils, ensuring hydration without waterlogging during heavy rains.

Fertilize: For knotgrass, use balanced fertilizers monthly in spring and summer, switching to bi-monthly during dormancy. Apply according to package instructions, avoiding excess nitrogen. Water knotgrass after fertilizing to distribute nutrients, ensuring optimal growth and development throughout its life cycle.

Pruning: Knotgrass is a resilient grass benefiting from early spring pruning to promote healthy growth and prevent invasiveness. Cut back stems to ground level, removing damaged parts to enhance appearance and air circulation. Clean tools to prevent disease spread.

Propagation: Knotgrass, native to wet areas, propagates effectively through division during its active growth phase. Separate the root mass carefully for robust new plants, replanting them in moist, fertile soil. Maintain spacing for sunlight access, and water regularly post-division to encourage establishment and growth.

Get tips and tricks for your plants.

Keep your plants happy and healthy with our guide to watering, lighting, feeding and more.

Download the App for Free

Images of Knotgrass

Attributes of Knotgrass

Distribution of Knotgrass

Care Guide for Knotgrass

PEOPLE ALSO ASK