10 Best Weed And Crabgrass Killers 2025 in the United States

Roundup Weed & Grass Killer₄ Concentrate is a versatile and effective product designed to tackle tough weeds and grasses, including dandelions, crabgrass, and poison ivy. Its active ingredients are powerful enough to kill these weeds down to the root, making it a reliable choice for those looking to maintain a pristine lawn or garden. The product can be used in various areas of your yard, from flower beds to walkways, and even large areas like lawns and garden plots.

One of its notable strengths is its rainfastness, becoming rainproof in just 30 minutes and showing visible results within hours. This means you don't have to worry about unexpected rain washing away your efforts soon after application. Additionally, the ability to plant 1 to 30 days after application offers flexibility in garden planning. Mixing and applying the concentrate is straightforward, requiring a tank or hose-end sprayer to cover about 300 sq. ft. per gallon of solution. However, the need to mix the product according to label directions might be a slight inconvenience for some.

On the environmental side, while effective, users should be cautious about its potential impact on non-target plants and wildlife. Safety precautions are necessary to avoid harmful effects. Despite its effectiveness, the concentrate form means it requires proper storage and handling, and at 24.9 pounds, it is relatively heavy. If you need a strong, rainproof solution for a variety of tough weeds and don't mind taking extra care with its application, Roundup Weed & Grass Killer₄ Concentrate is a solid option.

Scotts Liquid Turf Builder with Plus 2 Weed Control is a liquid weed killer and fertilizer that helps control various listed broadleaf weeds such as dandelion, clover, and chickweed while providing a nitrogen boost to your lawn. This product is designed for use on a variety of grasses including Bluegrass, Fescue, and Bermudagrass, making it versatile for different lawn types.

The ready-to-spray format makes it convenient to apply when weeds are actively growing, covering up to 6,000 sq. ft. for warm season lawns and 4,000 sq. ft. for cool season lawns with the 32 fl. oz. container. This dual-action product saves time by combining weed control and fertilization in one application. However, it's important to note that it is a post-emergent treatment, meaning it works on weeds that are already present rather than preventing new ones from sprouting.

This product primarily contains nitrogen, which is beneficial for lawn health but may not be suitable for users looking for a broader spectrum of active ingredients. Additionally, users should be mindful of its environmental impact and safety, ensuring it is applied correctly and safely stored. This product is ideal for users looking for a combined weed control and fertilization solution for their lawns, particularly if they prefer a liquid, ready-to-spray format.

Scotts Turf Builder Triple Action1 offers a comprehensive solution for lawn care by combining weed control, weed prevention, and fertilization in one product. This blend is particularly versatile, as it targets a wide range of common lawn weeds such as dandelion, clover, and chickweed, making it suitable for various grass types including Kentucky Bluegrass, Bermudagrass, and Tall Fescue. It's important to note that while it prevents crabgrass for up to four months, it doesn't eliminate existing crabgrass, which may require additional treatment if already present.

The product is designed to be applied with a Scotts spreader on a wet lawn and needs watering in after 24 hours, simplifying the application process for homeowners. The inclusion of active ingredients like Pendimethalin, 2,4-D, and Dicamba ensures effective weed control, but users should follow safety guidelines to minimize any potential environmental impact. A 33.94 lb. bag is sufficient to cover up to 12,000 sq. ft., making it ideal for larger lawns.

Its effectiveness as a pre-emergent and post-emergent weed killer depends on timely application, preferably in early spring when weeds like dandelions are actively growing. Despite its weight, the product is easy to handle and apply. This makes Scotts Turf Builder Triple Action1 a good option for homeowners looking to maintain a lush, weed-free lawn with minimal effort.