Grass Weeds

Pampas Grass

Cortaderia spp.

A very popular garden plant in the 1960’s and 1970’s, Pampas Grass has earned its status as a declared noxious weed.
  • Family Poaceae
  • Origin South America and New Zealand
  • Habit Large, long lived perennial tussock forming ornamental grass to 4.5m tall.
  • Leaves Light green, up to 2m long and finely tapering with prominent midrib and sharp edges that will cut the skin. A rim of hairs (to 3mm long) at leaf base (ligule).
  • Flowers Large feathery heads on stems to 3m tall. White-biege (C. selloana), or pink-mauve (C. jubata). Up to 50 plumes formed on one mature plant. Both single sex and bisexual plants exist. Summer-Winter.
  • Fruit Small (2mm), short-lived, up to 100,000 seeds set per plume.
  • Roots Strong fibrous root with rhizomes capable of re-shooting.
  • Dispersal Seed spread by water, wind, humans, contaminated soil (earthmoving equipment, car tyres etc) and garden refuse dumping.
  • Control Crowning, Slash and hand dig with mattock, Foliar spray. Bag all seed heads.

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