Winter is a critical time to control weeds before they spring back to life in spring. A targeted fall weed killer plus fertilizer helps strengthen your lawn and shuts down weed growth when temperatures are ideal. Below is a curated guide to effective winter weed killers and fall fertilizers you can find on Amazon, along with practical buying tips to help you choose the right product for your turf and yard size.
| Product | Brand | Coverage | Form |
|---|---|---|---|
| Scotts Turf Builder WinterGuard Fall Weed & Feed3 | Scotts | 4,000 sq. ft. | Weed killer + Fall fertilizer |
| Scotts Turf Builder WinterGuard Fall Weed & Feed5 | Scotts | 4,000 sq. ft. | Weed killer + Fall fertilizer |
| Scotts Turf Builder WinterGuard Fall Weed & Feed5 | Scotts | 12,000 sq. ft. | Weed killer + Fall fertilizer |
| Ortho WeedClear Lawn Weed Killer Ready-to-Use1 | Ortho | 1 gal. | Ready-to-use liquid |
| BioAdvanced All-In-One Lawn Weed and Crabgrass Killer I | BioAdvanced | Concentrate 40 oz | Kills lawn weeds and crabgrass |
Scotts Turf Builder WinterGuard Fall Weed & Feed3
Scotts Turf Builder WinterGuard Fall Weed & Feed3 combines weed control with fall fertilization to promote a stronger lawn by spring. It targets more than 50 listed weeds, including clover and dandelion, while feeding the grass as temperatures remain favorable for growth. Apply to a moist lawn when weeds are actively growing and the air temps are between 60°F and 90°F for best results. This product is designed for fall application to help prepare the lawn for winter dormancy and a healthier spring green-up.
Scotts Turf Builder WinterGuard Fall Weed & Feed5
This variant of WinterGuard combines weed suppression with fall lawn fertilization to help keep turf robust through winter and ready for spring recovery. It claims control of over 50 listed lawn weeds and is formulated to be applied to a wet lawn when weeds are actively growing, with temperatures typically between 60°F and 90°F. The product is sized for smaller lawns (4,000 sq. ft.) and provides a practical option for residential yards looking to balance weed management with nutrient delivery in the fall season.
Scotts Turf Builder WinterGuard Fall Weed & Feed5 (12,000 sq. ft)
This larger-format option delivers the same weed-control and fall-nutrition benefits as the smaller bag but covers 12,000 sq. ft. It’s designed for medium to larger lawns where both the weed population and winter stress on the turf are more pronounced. As with other WinterGuard products, apply when weeds are actively growing and temperatures are in the 60–90°F range for optimal uptake and lawn improvement by spring.
Scotts Turf Builder WinterGuard Fall Weed & Feed3 (12,000 sq. ft)
This 12,000 sq. ft. bag provides similar weed-killing and feeding benefits as the 4,000 sq. ft. variant, making it suitable for larger properties. The product targets a broad spectrum of lawn weeds and supplies essential nutrients to support autumn root development and vigor. As always, apply on a moist lawn when weeds are actively growing and temperatures stay within the recommended range to maximize efficacy through the fall season.
Ortho WeedClear Lawn Weed Killer Ready-to-Use1
Ortho WeedClear Ready-to-Use is a convenient spray that targets a broad range of weeds without harming many common lawn grasses when used as directed. It offers fast action, with results appearing within hours for visible control of weeds such as dandelion and clover. The Ready-to-Use format is particularly suitable for spot treatments and for homeowners who prefer a simple, ready-to-apply solution for lawn weed issues without mixing concentrates.
Southern Ag Atrazine St. Augustine Weed Killer 32oz
Southern Ag Atrazine targets weeds in St. Augustine and Centipede grasses. This 32-ounce bottle is designed for larger turf areas and can help manage common warm-season lawn weeds, especially in regions where St. Augustine grass is prevalent. As with any herbicide, follow label directions regarding application rates, weather conditions, and compatibility with the specific grass type to avoid damage to desirable turf.
Ortho WeedClear Lawn Weed Killer Ready-To-Spray3
This Ready-To-Spray version provides flexible application with similar weed-spectrum control as the Ready-to-Use variant. It’s suited for broader coverage across larger lawn areas when a quick broadcast treatment is desired. As with all lawn herbicides, ensure proper calibration, avoid misting into non-target plants, and keep pets and children away during and after application until the product dries.
BioAdvanced All-In-One Lawn Weed And Crabgrass Killer I
BioAdvanced All-In-One Lawn Weed and Crabgrass Killer I concentrates on delivering broad-spectrum weed control, including tough crabgrass, without harming many common lawn grasses when used as directed. The concentrate formulation requires mixing but allows targeted dosage across large areas. Its root-penetrating action aims to stop listed weeds at their source, helping maintain a cleaner lawn through fall and into winter dormancy.
Buying Guide: Winter Weed Control And Lawn Health
- Weed spectrum: Consider products that target your most problematic weeds (dandelion, clover, plantain, crabgrass) and be mindful of your lawn type (cool-season vs warm-season grasses).
- Seasonal timing: Fall applications should precede winter dormancy, with temperatures typically in the 60–90°F range for best absorption and effectiveness.
- Lawn size and coverage: Choose bags that match your total turf area to avoid waste and ensure even application. Larger bags are more cost-effective for bigger lawns, while smaller bags suit modest yards.
- Form and application method: Ready-to-use sprays are convenient for spot treat, while concentrates offer flexible coverage for larger areas. Follow label directions for mixing, if applicable.
- Impact on soil and environment: Some products also fertilize as they kill weeds, balancing nutrient needs. Avoid excessive use near water sources and follow safety instructions.
- Safety and compatibility: Check that the product is compatible with your grass species and avoid applying during extreme heat, drought, or windy conditions to prevent drift and lawn damage.
When selecting a winter weed killer, assess lawn size, weed pressure, and whether you prefer a one-step weed-and-feed or a dedicated weed killer with separate fertilizer timing. The products above emphasize weed control paired with fall nutrition, a combination that helps lawns resist winter stress and emerge healthier in spring. Always follow the product label for application rates and timing to maximize effectiveness and minimize risk to your turf.