One day later and no dead weeds. How long must
I wait? I'm spot spraying with that Ortho product which is
now three years old. Does that stuff die in the bottle? I split
it three years ago into 4, 4 ounce glass bottles. Dan
It usually takes several days to have any significant effect and a week
to 10 days to kill. Some harder to kill weeds require 2 applications.
And of course on some weeds, like crabgrass, it doesn't work at all.
I've used product that was many years old and it still worked fine.
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