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Crabgrass

Digitaria didactyla

Also called Blue Couch, Queensland Blue Couch, Blue Couch Grass, Blue Serangoon Grass, Blue Stargrass, Green Serangoon Grass, Blue Finger Grass

Crabgrass
Photo: Macleay Grass Man, CC BY 2.0

Blue couch is a mat-forming perennial grass that spreads by rhizomes and creeping stems, grown mainly as a pasture and lawn grass in warm climates. It needs full sun and regular mowing or grazing to stay dense and low.

Family
Poaceae (Grass family)
Grows as
Grass
Light
Full sun
Water
Water deeply and infrequently during dry spells, letting the top soil dry slightly between waterings.
Soil
Tolerates a wide range of soils, including poor and sandy ones; well-drained soil is best.
Temperature
Warm conditions; grows best in tropical and subtropical climates. Cold limit not specified in sources.
How easy
Easy
Safety
Not known to be toxic
Edible
Yes, some parts
Native range
Malawi to Mozambique, W. Indian Ocean
Climate
seasonally dry tropical

About

Digitaria didactyla is a species of grass known by the common names blue couch, Queensland blue couch, blue serangoon grass, green serangoon grass, blue stargrass, and petit gazon (in Mauritius). It is native to Mauritius, Réunion, parts of mainland Africa, and Madagascar. It has been introduced widely outside its native range, mainly for use as a pasture and turf grass. It has naturalized in some regions.

Uses

This species has long been used as a pasture grass for grazing livestock. Animals find it palatable. It is also planted as a lawn and used as golf course turf. It is thought to be "one of the most popular lawn grasses in Queensland." It may be used as other forms of groundcover. It is very good for erosion control.

Other Digitaria plants

African couchgrass · Raishan · Digitgrass · Fonio · Black fonio · Smooth crabgrass · Indian crabgrass · Hairy crabgrass · Crabgrass

Text excerpted from the Wikipedia article Digitaria didactyla by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.

The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.

Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.

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