10 Best Crabgrass Killers 2025 in the United States

Scotts Turf Builder Triple Action1 is a versatile product that serves as a weed killer, crabgrass preventer, and lawn fertilizer, making it suitable for homeowners looking to maintain a healthy lawn. One of its key strengths is its three-in-one formula, which not only targets various common weeds like dandelions and clover but also provides essential nutrients to encourage thick, green grass. It effectively prevents crabgrass for up to four months, allowing you to enjoy a weed-free lawn during the growing season.

This product is compatible with several types of grass, including Kentucky Bluegrass and Bermudagrass, making it a flexible option for diverse lawns. The application method is straightforward: you apply it to a wet lawn using a Scotts spreader and water it in, which is user-friendly for homeowners.

However, there are some drawbacks to consider. One limitation is that it does not kill existing crabgrass, so it’s most effective as a preventive measure rather than a solution for an already infested lawn. Additionally, it can only be used in specific states, excluding places like Alaska and Hawaii, which could limit its availability for some users. The product also requires careful timing, as it's best applied in spring when weeds are actively growing, which may require some planning. In terms of environmental impact, while Scotts products are generally formulated to be effective, some users may prefer organic options. Lastly, the granule form means you’ll need a spreader for even application, which might not be readily available for everyone. This product is ideal for homeowners looking for an efficient way to manage weeds while nurturing their lawns, but those with existing crabgrass problems may need to seek additional solutions.

The Ortho WeedClear Lawn Weed Killer Ready-To-Spray is a versatile product designed to kill a variety of common lawn weeds, including crabgrass, dandelion, chickweed, clover, and foxtail. This product is effective with just one application, making it a fast-acting solution for lawn care. One of its significant strengths is its selective action – it targets weeds without harming your lawn when used as directed, and it is compatible with popular lawn grasses like Bermudagrass, Buffalograss, Fescues, Kentucky Bluegrass, Ryegrass, and Zoysiagrass.

The application method is user-friendly; simply connect the sprayer to a garden hose and spray evenly over the lawn for up to 5,000 square feet of coverage. This makes it suitable for average-sized lawns and easy to use for homeowners who might not be familiar with lawn care products. Additionally, the ready-to-spray format saves time and effort compared to mixing concentrated solutions.

On the downside, the product is not available in Florida, Guam, Hawaii, and Louisiana, which could be a limitation for potential users in these regions. Also, as with any chemical product, there may be environmental concerns, although the product is designed to be used safely on lawns. The Ortho WeedClear is a practical option for those looking to manage weeds efficiently without damaging their lawns, but availability and environmental impact are factors to consider.

Roundup For Lawns₂ Concentrate is a powerful weed killer specifically designed for Northern grasses. It effectively targets and eliminates a wide range of weeds, including crabgrass, offering up to 3 months of control when used as directed. The active ingredients start working immediately and the solution becomes rainproof within 3 hours, ensuring that your efforts aren't washed away by unexpected showers.

This product is versatile enough to be used on various types of Northern grasses like Kentucky Bluegrass, Perennial Ryegrass, and Fescues, making it suitable for a variety of lawns. The concentrate form means you'll need to mix it with water in a tank sprayer or Dial 'N Spray, which might require a bit of effort but allows for even application over large areas. With a coverage of up to 5,000 sq. ft. per 32 fl. oz. bottle, it is quite efficient for medium to large-sized lawns.

It's important to carefully follow the instructions to avoid damaging your lawn, as misuse can harm desirable grass types. Environment-conscious users should note that while effective, chemical weed killers like this can have environmental impacts, so using them responsibly is crucial. The ease of use is balanced by the need for proper mixing and application, making it more suited for users who are comfortable with handling garden chemicals. This product is best for homeowners with medium to large lawns who need a robust solution for persistent weed problems, including crabgrass.