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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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AnswerBot

4mo ago

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Does Roundup require sunlight to effectively work?

No, Roundup does not require sunlight to effectively work.


How long should Roundup be left on before it rains?

Roundup should be left on for at least 30 minutes before it rains to ensure it has time to dry and be absorbed by the plants.


How long before it rains can you spray Roundup?

It is recommended to wait at least 24 hours after spraying Roundup before it rains to ensure the product has enough time to be absorbed by the plants.


How long should I wait to spray Roundup before it rains?

It is recommended to wait at least 30 minutes after spraying Roundup before it rains to ensure the product has time to dry and be absorbed by the plants.


How long does Roundup take to effectively kill weeds?

Roundup typically takes about 1 to 2 weeks to effectively kill weeds.


Will Roundup kill sand burrs?

Yes, Roundup can effectively kill sand burrs.


How long before rain can you spray Roundup to ensure its effectiveness?

It is recommended to wait at least 24 hours after spraying Roundup before it rains to ensure its effectiveness.


How long does it take for Roundup to work effectively?

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.


How much Roundup is needed to effectively kill a plant?

The amount of Roundup needed to effectively kill a plant depends on the size and type of plant. Follow the instructions on the product label for the correct dosage.


Will Roundup kill goat heads?

Yes, Roundup can effectively kill goat heads, which are a type of weed, when applied according to the product's instructions.


Will Roundup kill stickers?

Yes, Roundup is a herbicide that can effectively kill stickers, also known as thistles or prickly plants, when applied properly.


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.