Environmental weed in NSW and Victoria.
http://keyserver.lucidcentral.org/weeds/data/media/Html/poa_annua.htm
Poa annua is listed in the following regions:
Canberra & Southern Tablelands | Albury, Wodonga | South Coast
Maps
Albury Banksia Street Wetland Corridor Bens Walking Track Beowa National Park Broulee Moruya Nature Observation Area Bruce Ridge to Gossan Hill City Renewal Authority Area Crace Grasslands Eight Mile Creek Eurobodalla National Park Flea Bog Flat, Bruce Genoplesium vernale target area Haig Park Harcourt Hill MichaelBedingfied's Home Garden Mogo State Forest Point Hut to Tharwa Saltwater Swamp Nature Reserve Sullivans Creek, Lyneham South Sullivans Creek, TurnerPlaces
Bungendore, NSW Narrabundah, ACT Nicholls, ACT