Maintaining a lush, weed-free lawn often requires a smart blend of weed control and fertilization. The right weed killer fertilizer can kill existing weeds while feeding the turf, promoting green growth and crowding out new invaders. Below are five top-rated products designed for American lawns, plus practical buying guidance to help you choose the best option for your yard’s needs and climate.
| Product | Brand | Key Benefit | Size / Coverage |
|---|---|---|---|
| Liquid Turf Builder with Plus 2 Weed Control | Scotts Store | Kills broadleaf weeds; rapid greening | 32 fl. oz. |
| Halt’s Crabgrass & Grassy Weed Preventer | Scotts Store | Pre-emergent weed prevention | 10.06 lb. |
| Turf Builder Weed and Feed3 | Scotts Store | Weed control plus lawn feeding | 14.29 lb. |
| Roundup Weed & Grass Killer Refill | Roundup | Broad-spectrum weed and grass control | 1.25 gal. |
| Roundup Action 365 Weed & Grass Killer Plus 12 Month Preventer Refill | Roundup | Kills and prevents for up to 1 year | 1.25 gal. |
Scotts Liquid Turf Builder with Plus 2 Weed Control
Features include weed-killing action paired with fertilizer to promote rapid greening. The formula targets a variety of broadleaf weeds such as dandelion, clover, ground ivy, henbit, chickweed, plantain, and poison ivy, while delivering a nitrogen boost for lush turf. It’s designed for use when weeds are actively growing, helping lawns recover quickly after treatment. This liquid weed killer plus fertilizer offers the convenience of a ready-to-spray application and is suitable for improving color and density in many cool- and warm-season grasses.
Scotts Halts Crabgrass & Grassy Weed Preventer
This pre-emergent weed killer focuses on preventing weed germination, including crabgrass, foxtail, spurge, barnyardgrass, and more as listed. It is designed for early-spring or fall application on a dry lawn and remains effective through weather variations like rain or snow after application. By stopping weed seeds from sprouting, it helps maintain a clean lawn while you focus on proper mowing, irrigation, and overall lawn health. The product is intended for large lawn areas up to 5,000 sq. ft. with suitable coverage during a preventative window.
Scotts Turf Builder Weed and Feed3
Weed killer plus fertilizer in one product targets more than 50 listed lawn weeds, including clover and dandelion, while feeding the lawn to promote thicker turf and shade out future weeds. Apply when the lawn is actively growing and temperatures are between 60°F and 90°F. Avoid applying more than twice per year. This approach blends weed control with nutrient delivery to improve lawn density and resilience, helping reduce future weed invasion through a stronger root system and lush leaf growth.
Roundup Weed & Grass Killer Refill
Roundup Weed & Grass Killer Refills provide broad-spectrum control for weeds and grasses in various areas such as driveways, walkways, and beds. The refill format supports extended use without re-purchasing liquid concentrate, offering straightforward reapplication. While effective against many unwanted plants, it requires careful handling, outdoor use only, and adherence to label directions. This product is suitable for homeowners seeking a ready-to-use refill option to maintain open spaces where weeds tend to establish and spread.
Roundup Dual Action 365 Weed & Grass Killer Plus 12 Month Preventer Refill
This product combines powerful weed killing with a long-term preventive action designed to deter new growth for up to a year. It offers a comprehensive approach: eliminate existing weeds and protect the treated area from future germination. The 1.25-gallon size provides extended coverage for larger yards, driveways, and pathways. As with other Roundup formulations, users should follow label directions, apply under appropriate weather conditions, and ensure safe use around desirable plants and water sources.
Buying Guide: Weed Killer Fertilizer Options
- Weed spectrum: Choose products that target the specific weeds common to your region (broadleaf weeds, grassy weeds, or both).
- Timing and temperature: Many products work best when weeds are actively growing and daytime temperatures fall within recommended ranges. Pre-emergents require timing before weed seeds germinate.
- Mode of delivery: Liquid formulas offer quick action and uniform coverage, while granular blends provide slow-release feeding and easier spot applications.
- Soil and turf compatibility: Check suitability for your grass type (cool-season vs. warm-season) and existing soil conditions to avoid damage or slow greening.
- Preventive vs. curative: Decide whether you need immediate weed control plus feeding, or a preventive approach to curb future infestations.
- Environmental and safety considerations: Follow label directions to protect beneficial plants, pollinators, and water sources. Consider products with lower persistence if you have nearby gardens or children/pets.
- Application equipment: Some products are ready-to-spray liquids; others require spreaders or specialized applicators. Ensure you have compatible tools and storage space.
- Long-term lawn health: Look for formulas that provide balanced nitrogen and essential nutrients to support root growth, resilience, and color improvement in your specific grass variety.
- Maintenance plan: For best results, integrate weed control with proper mowing height, irrigation, and aeration practices to sustain a dense, weed-resistant lawn year-round.