10 Best Post Emergent Weed Killers 2025 in the United States

The Roundup Weed & Grass Killer₄ with Comfort Wand is a robust solution for tackling a variety of tough weeds and grasses, including dandelion, crabgrass, and poison ivy. It is a selective weed killer, meaning it targets specific types of weeds without harming desired plants when used correctly. The product stands out for its quick rainproof time of just 30 minutes and visible results within hours, making it highly effective for users looking for fast action.

Additionally, the option to plant 1 to 30 days after application adds to its convenience, allowing gardeners to plan ahead without long delays. The Comfort Wand feature is designed to ease application with a continuous spray mechanism, reducing hand fatigue during use, which is a significant benefit for larger areas or prolonged tasks.

However, users should still exercise caution around pets and children, even though no specific safety measures are highlighted for them. This weed killer is ideal for homeowners with flower beds, patios, walkways, and other landscaped areas who need a powerful and easy-to-use weed control solution.

Ortho WeedClear Weed Killer for Lawns Concentrate is designed to target and kill over 250 common lawn weeds, including dandelions and clover, without harming your grass (when used as directed). One of its standout features is its quick action - you'll start seeing visible results in just a few hours. Plus, it's rainproof within an hour, so you don't have to worry about unexpected showers washing it away.

This product is suitable for large lawns as it can treat up to 16,000 square feet, making it a cost-effective solution for big areas. The application is straightforward, either with an Ortho Dial N Spray or a tank sprayer, which adds to its convenience. Safety-wise, it's reassuring to know that people and pets can re-enter the treated area once the spray has dried, making it a family-friendly option.

It's essential to follow the instructions carefully to avoid any potential harm to your grass. Ortho WeedClear is a powerful and user-friendly option for those looking to maintain a weed-free lawn without putting their grass, pets, or family at risk.

The Ortho GroundClear Weed and Grass Killer2 Concentrate is a powerful solution targeting a wide range of weeds including dandelions, chickweed, crabgrass, and moss. It is a non-selective herbicide, meaning it will kill any plants it comes in contact with, so it should not be used on lawns or desirable grasses.

One of the standout features of this product is its fast-acting formula; it begins to show results in just 15 minutes and becomes rainproof within 2 hours after drying. This makes it highly effective for quick weed control in various outdoor areas such as patios, landscapes, walkways, and driveways. However, caution is necessary as it is not suitable for areas where children or pets might come into contact with treated surfaces immediately after application. Safety improves once the product has dried thoroughly.

This concentrate can treat up to 600 square feet, offering decent coverage for small to medium-sized areas. The OMRI listing indicates it meets organic standards, which can be a plus for those looking for eco-friendly options. Its non-selective nature requires careful application to avoid damaging plants you wish to keep. This product is ideal for users needing a fast-acting, broad-spectrum weed killer for hard-to-manage areas, provided they can ensure safe use around kids and pets post-application.