Sourgrass

(Digitaria insularis)

Sourgrass (Digitaria insularis)

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Estimated Native Range
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Summary

Digitaria insularis, commonly known as Sourgrass, is a perennial grass that exhibits both deciduous and semi-deciduous characteristics depending on the climate. It is native to tropical savannas and grasslands in Latin America, including Mexico, Central America, and Northern South America. This grass typically reaches heights of 3-5 feet and spreads 4-6 feet wide. It forms dense clumps and has a coarse texture with flat, wide leaves and a distinctive purplish inflorescence that appears during its flowering season.

Sourgrass is valued for its rapid growth and adaptability to various soil types, making it useful for erosion control and as a forage plant in its native range. However, its aggressive growth can be problematic, and it is considered invasive in some regions outside its native habitat. In cultivation, it requires full sun to part shade and moderate watering, thriving in soils with good drainage. Gardeners should be cautious and consult local regulations before planting to prevent unwanted spread.CC BY-SA 4.0

Plant Description

  • Plant Type: Grass
  • Height: 3-5 feet
  • Width: 4-6 feet
  • Growth Rate: Moderate
  • Flower Color: N/A
  • Flowering Season: Summer
  • Leaf Retention: Deciduous, Semi-Deciduous

Growth Requirements

  • Sun: Full Sun, Part Shade
  • Water: Medium
  • Drainage: Fast

Common Uses

Erosion Control, Low Maintenance

Natural Habitat

native to tropical savannas and grasslands in Latin America, including Mexico, Central America, and Northern South America

Other Names

Common Names:

Scientific Names: , Digitaria insularis, Trichachne insularis, Tricholaena insularis, Andropogon insulare, Panicum leucophaeum, Panicum insulare, Andropogon insularis, Milium villosum, Valota insularis

GBIF Accepted Name: Digitaria insularis (L.) Mez ex Ekman