Well fooey

jimdeere

I just got done spraying a sprayer full of Round Up and now it’s raining.

dcon12

If the roundup dried before it rained, it will be OK. Don

Horse Plains Drifter

Supposed to be rain proof in something like 30 minutes IIRC.

jimdeere

Guess I’ll find out in about a week.

mohawk600

Even so......if the rain washed it off......it should soak into the roots of whatever you sprayed it on. Maybe not a total loss.

Cling2myguns

Roundup is supposed to be rain proof once dry. It works by being taken up through the leaves not roots. It is best sprayed when plants are actively growing, i.e. sunny day. I have had it not work as well when it rains an hour or two after application, but usually it still does some good. It is a systemic herbicide as once the leaves soak it in it blocks photosynthesis and kills the whole plant and roots.

TN seems to have several varieties of weeds that are round up resistant. Trimec 2-4D seems to work better on them, but it doesn't harm grass.

jimdeere

Part of my parking area is gravel and the crabgrass comes thick about this time of year. Also, I spray the margins of our shared driveway to keep the grass back. 

If it washed off, I’m only out a quart and a half of Roundup and a little time.
Actually, any rain this time of year is a blessing. 

Butchdog2

My goodness, quart and a half, how many acres did you spray?