how long to wait after 'Round-Up' spray?
About 3 weeks ago I sprayed a large area with Extended Control Round Up to get rid of thick poison ivy and other tenacious weeds, then mulched. I'd like to plant some bushes there but need to wait until the Round Up is sufficiently neutralized by rains (it's been very rainy). Although the Extended Roundup claims to last 3 months, weeds and grasses are growing back now. I'm wondering if that is a good sign that it's safe now to go ahead and plant some bushes or other perrenials?