On 7/28/2015 10:04 AM, (PeteCresswell) wrote:
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?


Most retail versions of Roundup are too dilute to effectively control
brushy and woody plants. You need a minimum 41% concentrate of Roundup
to handle them, and that gets expensive. Another highly effective
herbicide for woody plants including poison ivy is triclopyr. Read
your labels and buy the strongest concentration you can find.