I know about Non Hodg... Lymph... I just want to know when I can walk on the plants I will spray with Roundup so that I don't take residual spray to the rest of the yard. 30mins? 1 hr? Anybody with experience here? At some point I can walk on them to get to parts of the yard that the sprayed plants are either close to or are in the middle of what I need to take care of NOW. I don't want to wait 3 hours when 30mins. is enough, but if it takes 3 hours, so be it. Thanks. I am a DR. I know about the health issues. I use the stuff sparingly and carefully. But this is one topic Roundup.com doesn't give me a good answer. Thanks for any guidance, esp. from someone whose done it.