9 Best Granular Weed Killers 2025 in the United States

Scotts Halts Crabgrass & Grassy Weed Preventer is designed to prevent a variety of lawn weeds, such as crabgrass, foxtail, spurge, barnyardgrass, Poa annua, henbit, moss (except in California), corn speedwell, and chickweed. It is a pre-emergent weed killer, meaning it stops weeds before they sprout, which is effective if applied in early spring or fall.

This product is versatile in terms of application timing, as its performance is not affected by rain, snow, or freezing weather once applied. It covers a substantial area, up to 10,000 sq. ft., making it suitable for larger lawns. The granule form simplifies application, allowing for even distribution across the lawn.

It is compatible with all grass types except Dichondra or Bentgrass, thus providing flexibility for various lawn compositions. While it prevents many types of weeds, it does not address post-emergent weeds that are already present. The product's longevity is promising, providing season-long prevention when applied correctly.

The DOW Snapshot 2.5 TG Granular Pre-emergent Herbicide is a highly effective solution for controlling a wide variety of weeds. One of its standout features is its ability to manage up to 111 different broadleaf and grassy weeds, making it a comprehensive choice for garden and lawn care. The product promises up to 6-8 months of control, which means fewer applications throughout the year, offering convenience and long-term results. The active ingredients, isoxaben and trifluralin, are well-regarded for their effectiveness in preventing weed emergence.

It is crucial to apply the granules before rainfall or irrigation for optimal performance, which might require some logistical planning. The coverage area is 1000 square feet per application, and the recommended application rate ranges from 2.3 to 4.6 lbs per 1000 square feet, providing flexibility based on the level of weed infestation. Weighing 50 pounds, the product can be a bit bulky, but it's designed for easy spreading.

Ideal for those looking to maintain weed-free lawns and gardens with minimal effort, this herbicide is a strong contender in the pre-emergent category.

Scotts WeedEx Prevent with Halts is a granular pre-emergent weed killer designed primarily to stop crabgrass before it appears, which is great if crabgrass is a common problem in your lawn. It covers a moderate area of 5,000 sq. ft. per 10.06-pound bag, making it suitable for small to medium-sized yards. The active ingredient, Pendimethalin, is effective at preventing grassy weeds, and you can apply it in early spring for crabgrass or in fall to reduce winter weeds like Poa annua, henbit, and chickweed. This flexibility in timing helps provide season-long protection.

However, it's important not to use it on certain grass types like Dichondra and Bentgrass, which limits its use if you have those grasses. Application is straightforward since it comes in a bag form, but you will need a spreader to evenly distribute it. One thing to keep in mind is that this product works by prevention, not by killing weeds that are already growing, so timing your application correctly is crucial.

In terms of safety and environmental impact, Pendimethalin is a common ingredient in weed control products, but as with all chemicals, following instructions closely is important to minimize any risks. Many users find it effective, but if you need a product that removes existing weeds or works on a wider variety of grass types, you might want to look elsewhere. For those focused on preventing crabgrass and some common grassy weeds with early application, Scotts WeedEx Prevent with Halts offers a reliable and easy-to-use solution.