On 12/08/2013 10:52, Windmill wrote:
Does anyone know how long glyphosate takes to kill various weeds?
E.g. elderberry bushes, dockins, brambles, bracken, grass?

In this weather you should see some yellowing of the growing points
within two weeks of application and a complete kill after a month. It is
a slow acting translocating weedkiller that does roots as well as top
growth. If you see an immediate effect you used it too strong!

Don't want to waste money by spraying again if it's premature to do so.

If it is wilderness that you are reclaiming the best value for money is
leave it all until tinder dry. Make a firebreak around the edges and
then flash burn it to see off most of the weed seeds. The black scorched
earth makes it much easier to spot weed any green shoots.

--
Regards,
Martin Brown