On 28/05/2014 11:15, Emery Davis wrote:
I mean regular hogweed, not the giant variety thank goodness.

Over the last 20 years (there was none at all then) it has installed
itself in the fields and likes to come up in cleared areas around trees
and shrubs. I've not had much luck with glyphosate, the huge root seems
to laugh it off. I've tried cutting the flower heads off, on the theory
that since it's biennial (I think) it will go away, but the seeds seem to
set anyway.

Yesterday I dug a bunch of it up as best as possible, but of course there
was a lot of root left in ground. Is it likely to come back, or is this
a good method.

It should be good enough to hit it with any broadleaf specific herbicide
assuming it is in grass or glyphosate if you don't mind a bit of
collateral damage and scythe it down in flower before it sets seed.

--
Regards,
Martin Brown