How long after spraying Roundup or weed killer should dogs stay off?
Based on EPA labels and sources cited below, last checked November 4, 2026. Always follow the label on your product.
Short answer: until the spray has completely dried. That is what the Roundup labels say, and it is the same rule on the other liquid products we checked. No label we read gives minutes, so you have to check.
What the labels say
- Roundup Super Concentrate, glyphosate (71995-25):
People and pets must not touch treated plants or enter treated areas until after spray has dried.
Label - Roundup Ready-To-Use, newer formula (71995-65):
Do not allow people or pets to enter the treated area or touch treated plants until spray has dried.
Label - Scotts Liquid Turf Builder Weed & Feed (538-328):
Do not allow people or pets to enter the treated area until sprays have dried.
Label
How long does drying take?
None of these labels gives a number of minutes, and we do not give one either, because any number would be a guess. NPIC's general advice is to keep pets away until the pesticide is completely dry and the area has been well ventilated. Check treated plants, including ones in shade, before letting pets back.
"Rainproof" is not a pet rule
The Roundup labels include rainproof marketing claims. Those statements are about the product's performance in rain, and they are separate from the label's pet rule, which is until spray has dried.
Dogs that eat grass
NPIC says pets may be at risk if they touch or eat plants still wet with glyphosate spray.
Dogs vs cats and kids
The labels use the same rule for people and all pets: off until dry.
Product details: Roundup and dogs, 2,4-D and dogs.
Questions people ask
How long after spraying weed killer can dogs go out?
Every liquid weed killer label we checked says until the spray has dried. None gives a number of minutes, because drying time depends on weather.
How long does weed killer take to dry?
The labels do not say. Because no label we read gives a time, check that treated plants are dry before letting pets back.
Does "rainproof in 30 minutes" mean my dog can go out in 30 minutes?
No. Rainproof claims on Roundup labels are about the product still working if it rains, not about pets. The pet rule on the label is still until the spray has dried.
Sources
- EPA label, Reg. No. 71995-25, accepted January 28, 2021. Checked November 4, 2026.
- EPA label, Reg. No. 71995-65, accepted November 29, 2023. Checked November 4, 2026.
- EPA label, Reg. No. 538-328, accepted January 10, 2025. Checked November 4, 2026.
- NPIC: Glyphosate General Fact Sheet (reviewed 2010, limited revision 2019). Checked November 4, 2026.
- NPIC: Pesticide Use Around Pets (updated April 14, 2026). Checked November 4, 2026.