On Wed, 29 Jul 2015 06:28:10 -0700, "Edmund J. Burke"
wrote:

"(PeteCresswell)" wrote in message
.. .

It's been about five days since I first sprayed some poison ivy with
Roundup - with a touch up application yesterday.

I'm not seeing any signs of distress in the stuff.

OTOH, 3 days on crab grass and the stuff is clearly dead or on the way.

Bottom Line: Should Roundup be effective against poison ivy?

If so, what timeframe?

I've found that glyphosate does kill ivy, but it takes longer and
often needs a few applications. I suspect this is partly due to the
waxy leaves, so maybe a bit of a seeing to with a strimmer first might
help.

I bought a 5 litre container of clinic ace 360 g/l which lasts for
ages at the correct dilution. Much cheaper than roundup and just as
effective.