10 Best Chemical Weed Killers 2025 in the United States

The Ortho GroundClear Year Long Vegetation Killer1 Concentrate is a systemic and post-emergent weed killer, making it effective at killing weeds and grasses down to the root and preventing regrowth for up to one year. It is particularly suitable for long-term weed control on driveways, sidewalks, gravel areas, parking areas, rock and desert landscapes, under decks, and along fences.

The concentrate formula requires mixing with water and application using a tank hose sprayer, which may be slightly inconvenient for users looking for a ready-to-use product. However, its coverage is substantial, treating up to 3,200 sq. ft. with one 2-gallon container, which can be cost-effective for large areas. The product starts working immediately, which is a strong point for those needing quick results.

This product is well-suited for users needing a powerful and long-lasting weed control solution for extensive areas, though it requires careful preparation and application.

The Ortho WeedClear Lawn Weed Killer Concentrate is designed as a fast-acting solution that targets common lawn weeds such as dandelion, crabgrass, clover, chickweed, and foxtail. It is a post-emergent systemic herbicide, meaning it works by being absorbed into the weed and killing it down to the root, which helps prevent regrowth. This concentrate form requires dilution before application, so it can't be sprayed directly from the bottle. It is intended for use on many common lawn grasses including Bermudagrass, Kentucky Bluegrass, Ryegrass, and others, and when used as directed, it won't harm your lawn.

The product covers a fairly large area (up to 5,000 square feet), making it suitable for medium to large lawns. The product is made by a reputable company (Scotts) and has a solid customer rating of 4.1 out of 5, reflecting generally positive user experiences. Users should carefully follow instructions for application and safety, as improper use might affect nearby plants or the environment. Applying the product during dry weather is advisable to ensure effectiveness and reduce the chance of it being washed away.

This product is a practical choice for homeowners wanting to control a variety of tough lawn weeds without damaging their grass, but attention to mixing and application details is important for the best and safest results.

The Ortho WeedClear Weed Killer for Lawns Concentrate is a systemic, post-emergent herbicide designed to eliminate over 250 common weeds, including dandelions and clover, without damaging your lawn when used correctly. This product is particularly effective when applied to young, actively growing weeds in the spring or fall, with visible results appearing in just a few hours. It is also rainfast within an hour of drying, making it a convenient choice for those concerned about sudden weather changes. Additionally, once the spray has dried, the treated area is safe for both people and pets to enter.

However, this concentrate requires careful mixing and application, as it cannot be used directly from the container. It's important to follow the product label for specific instructions to avoid any misuse. With a coverage of up to 64,000 square feet, it's suitable for large lawns. Nonetheless, some users may find the precautionary measures and mixing process a bit cumbersome.

The active ingredient is a herbicide, which, like all chemicals, should be handled with care to minimize environmental impact. It is a reliable and widely used solution for lawn weed control, especially for those willing to follow detailed application instructions.