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Roundup typically takes about 2 to 4 days to start showing visible effects on weeds, but it may take up to 2 weeks for complete control.

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4mo ago

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Does Roundup require sunlight to effectively work?

No, Roundup does not require sunlight to effectively work.


How long does it take for Roundup weed killer to work effectively?

Roundup weed killer typically takes around 2 to 4 days to start showing visible effects on weeds, with full effectiveness achieved within 1 to 2 weeks.


How long does Roundup take to work on killing weeds?

Roundup typically takes around 1 to 2 weeks to fully kill weeds after application.


How long does it take for Roundup to work before rain?

Roundup typically needs about 30 minutes to 4 hours to dry on the plants before rain.


How long does Roundup take to work before rain affects its effectiveness?

Roundup typically takes about 30 minutes to 4 hours to be rainfast, meaning it won't be washed away by rain.


Does Roundup work effectively if it rains?

Roundup may be less effective if it rains shortly after application, as the rain can wash away the herbicide before it has a chance to work. It is generally recommended to apply Roundup on a dry day with no rain in the forecast for at least 24 hours.


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How long does it take for grass killer to work effectively?

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How long should you wait before pulling weeds after spraying Roundup?

You should wait at least 24 hours before pulling weeds after spraying Roundup to allow the herbicide to fully work and be absorbed by the plants.