Can I Treat Weeds With Roundup® Weed & Grass Killer Products When It's About to Rain?

Discover the answer right here.

For best results, we recommend using Roundup® Weed & Grass Killer products on dry, warm, wind-free days. But if it’s about to rain, fear not — all of our products should dry and become rainfast within 30 minutes to 3 hours — some even faster.

The products below have a rainfast range of 10 minutes to 3 hours. Scroll down to a product to see the rainproof time.

Ideal Conditions

A wind- and rain-free day above 60° F helps speed up the drying of Roundup® Weed & Grass Killer products.

Weeds and Rain

Weeds love to sprout after it rains, which is why waiting for dry conditions is ideal. Waiting for rain-free days also ensures that Mother Nature won't wash away any of the product before it goes to work on the weed.

Landscape Weeds

ROUNDUP® READY-TO-USE WEED & GRASS KILLER III

Rainproof in 10 MINUTES.

Lawn Weeds

Roundup® For Lawns1 Ready-to-Use

Rainproof in 3 HOURS.

Concentrates

ROUNDUP® WEED & GRASS KILLER CONCENTRATE PLUS /
ROUNDUP® WEED & GRASS KILLER SUPER CONCENTRATE

Rainproof in 30 MINUTES.

Driveway & Patio Weeds

ROUNDUP® MAX CONTROL 365 PRODUCTS

Rainproof in 30 MINUTES.

ROUNDUP® EXTENDED CONTROL WEED & GRASS KILLER PLUS WEED PREVENTER PRODUCTS

Rainproof in 10 MINUTES.

Poison Ivy & Tough Brush

ROUNDUP® POISON IVY PLUS TOUGH BRUSH KILLER PRODUCTS

Rainproof in 30 MINUTES.

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