Marram Grass


General description

Coarse perennial grass with glaucous-grey tufts to 170cm, fibrous roots. Leaf blade tightly rolled (appears cylindrical) seedhead spike 15-30cm long.


Mainly rhizomes, occasionally seed.

Has been widely distributed in NZ for the purpose of sand stabilisation. Can be useful in stabilising inland dunes on productive land, but usually has adverse effects in natural coastal systems. Its ability to accumulate sand effectively means that it gives rise to higher, steeper dunes than native dune vegetation. Changes dune profile, outcompetes spinifex & pingao.

Site management

Use haloxyfop where pingao or sedges present (NB haloxyfop will kill spinifex, stunt pingao). Follow up required annually until eradicated. Begin control at windward end of infestation, or where native veg is best represented. To prevent rhizome movement, control at eroding sites & prevent physical damage of marram at other sites. Spray after rain if possible to minimise salt contamination of herbicide, esp when using glyphosate.

Recommended approaches

1. Dig out small infestations & dispose of rhizomes.
2. Spray (150ml haloxyfop + 100ml crop oil/10L).
3. Spray (125ml glyphosate + 20ml penetrant/10L)

Caution: when using any herbicide or pesticide PLEASE READ THE LABEL THOROUGHLY to ensure that all instructions and safety requirements are followed.

RPMS status

Species to be researched (not a Pest Plant) - Whole Region
marram grass - Main species image