hi ant
i can see the problem, this website mentions several grasses that look
like serrated tussock, see the heading "look alikes"
http://www.esc.nsw.gov.au/Weeds/Shee...%20tussock.htm
and this one points out how similar poa is to serrated tussock:
http://www.sgaonline.org.au/weed_nas...richotoma.html
but i've learned a lot about grass weeds just because you asked!

ant wrote:

I do get some of the heads rolling up and becoming tumble weed type things.
But it could be good tussock, not evil tussock. Very frustrating.