Vigorous clump-forming perennial grass growing 1.5 m tall. Roots fibrous, up to 50 cm deep. Densely tufted, narrow hair like leaves harsh to the touch, margins rolled inwards and usually hairless. Leaves bright green to blue-green (blushes bronze-red after hard frost), usually curly at tips. Pyramid-shaped flower heads with small white flowers. Seeds blackish olive-purple (ripening greyish); on arching stems to 1 m long, Summer.
Steep, dry sites, short and tall tussockland, coastal areas, riverbeds, offshore and inshore islands, cliffs, herbfield; potentially throughout NZ.
Seeds via wind, mud on vehicles, stock and people. Vegetative spread.
Quickly forms dense stands in open country, displacing other grasses.
Difficult to control, repeat treatments every 3 months needed. Minimise disturbance, exclude stock. Densely plant with shade-forming species, where appropriate.
1. Dig out isolated plants. All year round.
2. Weed wipe: (500ml glyphosate/L). Spring-Summer.
3. Spray herbicide (150ml glyphosate (dense stands) + 20ml penetrant/10L or 150ml haloxyfop (selective) + 50ml crop oil (if not included)/10L) Spring-Summer.
Caution: when using any herbicide or pesticide PLEASE READ THE LABEL THOROUGHLY to ensure that all instructions and safety requirements are followed.