Does your perfect green lawn often look more like a patchy battlefield? You spend hours mowing, watering, and dreaming of that lush carpet, only to see stubborn weeds pop up like tiny green invaders. It’s frustrating, right? You want a simple solution that tackles the weeds without harming your beautiful grass.
Choosing the right weed killer fertilizer adds another layer of confusion. Should you use a pre-emergent or a post-emergent? Which product feeds the good grass while attacking the bad? Finding the balance between powerful weed control and healthy lawn nutrition can feel like a guessing game. Using the wrong mix can leave you with dead patches or weeds that just laugh at your efforts.
This guide cuts through the noise. We will break down exactly what weed killer fertilizer is, how it works, and what you need to look for on the bag. By the end of this post, you will know precisely which product will give you that enviable, weed-free yard. Let’s dive in and unlock the secret to a truly magnificent lawn.
Top Weed Killer Fertilizer For Lawns Recommendations
- Up to 2X more powerful dandelion and clover control (vs. previous formula)
- Clears out dandelions and clover—satisfaction guaranteed
- Weedgrip Technology grips the weeds you see—and the ones you don't
- Scotts most powerful weed and feed
- Feeds to thicken lawns and crowd out weeds
- WEED AND FEED FOR LAWNS: Apply this combination weed killer for grass and lawn food to your wet lawn when weeds are actively growing and daytime temperatures are consistently between 60°F and 90°F; don't apply more than 2X per year
- WEED KILLER PLUS LAWN FOOD: Scotts Turf Builder Weed & Feed5 weed killer plus fertilizer for grass is a clover and dandelion killer for lawns that also feeds to thicken your lawn and crowd out future weeds
- DO NOT USE ON: Do not use this grass fertilizer for lawns plus yard weed killer on St. Augustinegrass (including Floratam), Dichondra, Lippia, Carpetgrass, and Bentgrass lawns
- USE ON LISTED GRASS TYPES: Apply this lawn care product to Bahiagrass, Bermudagrass, Bluegrass, Centipedegrass, Fescue, Ryegrass, and Zoysiagrass
- WEED CONTROL FOR LAWNS: These Scotts weed killer plus lawn fertilizer granules control over 50 listed lawn weeds, including clover, dandelion, plantain, morningglory, chicory, eveningprimrose, and purslane
- Up to 2X more powerful dandelion and clover control (vs. previous formula)
- Clears out dandelions and clover—satisfaction guaranteed
- Weedgrip Technology grips the weeds you see—and the ones you don't
- Scotts most powerful weed and feed
- Feeds to thicken lawns and crowd out weeds
- 3-IN-1 FORMULA: Scotts Turf Builder Triple Action1 is a three-in-one lawn fertilizer and weed control formula that kills listed lawn weeds, prevents crabgrass, and feeds grass to build thick, green lawns
- WHERE TO USE: This grass fertilizer, crabgrass preventer, and clover and dandelion killer for lawns is for use on Bahiagrass, Centipedegrass, Kentucky Bluegrass, Perennial Ryegrass, Bermudagrass, Tall Fescue, Fine Fescue, and Zoysiagrass
- LAWN WEED CONTROL: This lawn care product is a weed killer for lawns that controls dandelion, clover, dollarweed, ground ivy, chickweed, plantain, henbit, English daisy, and other listed lawn weeds
- CRABGRASS PREVENTER: This pre-emergent weed killer also prevents crabgrass for 4 months (will not kill existing crabgrass); stops other listed grassy weeds from invading your lawn
- HOW TO USE: Apply to a wet lawn with a Scotts spreader, then water in after 24 hours; apply in early spring when dandelions are actively growing
- WHERE NOT TO USE: This weed and dandelion killer for lawns and lawn care product should not be used on Dichondra, Carpetgrass, 'Floratam' St. Augustinegrass, Creeping Bentgrass, or turfgrass where desirable clovers are present
- LAWN WEED KILLER: Scotts Weed Control for Lawns is a weed killer for grass that starts working on contact to kill even the toughest weeds down to the root
- KILLS LISTED WEEDS: This broadleaf weed killer for lawns controls over 200 listed weeds, including dandelion, clover, dollarweed, chickweed, poison ivy, henbit, oxalis, ground ivy, and purslane
- WHEN TO USE: Apply weed killer granules in the spring or early fall when broadleaf weeds are actively growing
- COVERAGE: One 14 lb. bag of Scotts Weed Control for Lawns granular weed killer covers 5,000 sq. ft.
- 3-IN-1 FORMULA: Scotts Turf Builder Triple Action1 is a three-in-one lawn fertilizer and weed control formula that kills listed lawn weeds, prevents crabgrass, and feeds grass to build thick, green lawns
- WHERE TO USE: This grass fertilizer, crabgrass preventer, and clover and dandelion killer for lawns is for use on Bahiagrass, Centipedegrass, Kentucky Bluegrass, Perennial Ryegrass, Bermudagrass, Tall Fescue, Fine Fescue, and Zoysiagrass
- LAWN WEED CONTROL: This lawn care product is a weed killer for lawns that controls dandelion, clover, dollarweed, ground ivy, chickweed, plantain, henbit, English daisy, and other listed lawn weeds
- CRABGRASS PREVENTER: This pre-emergent weed killer also prevents crabgrass for 4 months (will not kill existing crabgrass); stops other listed grassy weeds from invading your lawn
- HOW TO USE: Apply to a wet lawn with a Scotts spreader, then water in after 24 hours; apply in early spring when dandelions are actively growing
- KILLS TOUGH WEEDS: Apply our revolutionary 5-in-1 Weed and Feed formula to actively growing turf to target over 200 listed types of weeds, including hard-to-kill weeds like dandelions, clovers, and black medic
- PREVENTS NEW WEEDS UP TO 6 MONTHS: Forms a protective soil barrier that prevents listed weeds from emerging for up to 6 months; Apply in spring or early summer, even if Crabgrass and weeds have already sprouted
- KILLS LARGE CRABGRASS: Contains four proven weed killers to control crabgrass, killing to the root; Crabgrass starts to turn purple in 3 days, that's the sign it's working; Creates a long-lasting barrier that helps stop crabgrass from returning for up to 6 months
- FEEDS & GREENS: Fertilizer feeds and greens your lawn for up to 3 months to promote thicker, healthier turf; Apply granules with a broadcast or drop spreader for smooth, even coverage across established lawns
- GET MORE FROM THE BLUE BOTTLE: From simple spot treatments to season-long protection, BioAdvanced's science-based solutions make it simple to control unsightly weeds, feed your lawn, and protect against damaging diseases without harming the lawn
- 10 MINUTE LAWN CARE: A 32 fl. oz. bottle of Scotts Turf Builder Liquid Lawn Food Plus Weed Control connects to your hose and provides 2,000 sq. ft. of weed control for lawns in 10 minutes
- LESS PLASTIC WASTE: The reusable applicator is designed to be used with our refill bottles of fertilizer plus lawn weed killer (sold separately)
- 2-IN-1 FORMULA: Our dual-action weed and feed for lawns controls stubborn weeds like dandelions and clover while feeding your grass to build a thicker, greener lawn that crowds out future weeds
- EASY TO USE: The translucent lawn food plus weed killer spray bottle lets you see exactly how much product you’re using as you spray, eliminating guesswork
- USE ON MOST LAWNS: This fertilizer plus weed killer for lawns is labeled for use on most common lawns, including bluegrass, fescue, ryegrass, bahiagrass, bermudagrass (common and hybrid), centipedegrass, and zoysiagrass when weeds are actively growing
The Lawn Lover’s Guide: Choosing the Right Weed Killer Fertilizer
A beautiful, green lawn is something everyone wants. Sometimes, pesky weeds try to ruin the look. Weed killer fertilizers help you fight weeds while feeding your grass. This guide helps you pick the best one for your yard.
Key Features to Look For
When shopping, look for these important features. These tell you how well the product will work.
Targeted Weed Control
- Selective vs. Non-Selective: Most lawn products are selective. This means they kill weeds (like dandelions) but leave your desirable grass unharmed. Non-selective products kill everything they touch, including your lawn. Choose selective for lawns!
- Weed Spectrum: Check the label. Does it list the weeds you actually have? Some products target broadleaf weeds, while others handle grassy weeds.
Fertilizer Benefits
- NPK Ratio: This stands for Nitrogen (N), Phosphorus (P), and Potassium (K). Nitrogen makes grass green and encourages growth. A good ratio feeds your lawn strongly after the weeds are gone.
- Slow-Release Options: Slow-release fertilizers feed your lawn over several weeks. This prevents sudden, fast growth spurts and keeps the lawn greener longer.
Application Type
- Granular vs. Liquid: Granular products spread easily with a spreader and often last longer in the soil. Liquid products mix with water and start working faster.
- Pre-Emergent vs. Post-Emergent: Pre-emergents stop seeds from sprouting (great for spring). Post-emergents kill weeds that are already visible (great for summer touch-ups).
Important Materials and Ingredients
The chemicals inside determine the product’s power. Understanding these helps you make smart choices.
Active Weed Killers
Look for common active ingredients like 2,4-D, Dicamba, or MCPP. These chemicals disrupt how the weeds grow. Make sure the amount listed is strong enough for tough weeds in your area.
Nutrient Sources
Good fertilizer uses high-quality sources for NPK. Urea is a common nitrogen source. Slow-release formulas often use sulfur-coated urea for extended feeding. Better quality materials lead to healthier grass.
Factors That Improve or Reduce Quality
The quality of your results depends on more than just the bag.
Improving Quality
- Timing: Applying the product at the right time of year (when weeds are actively growing) greatly improves results.
- Soil Conditions: Healthy soil absorbs nutrients better. Aerating your lawn before fertilizing can improve overall absorption.
- Watering: Follow the label’s watering instructions. Too little water might prevent the fertilizer from spreading, and too much too soon might wash the chemicals away.
Reducing Quality
- Rainfall: Heavy rain shortly after application can wash the product away, reducing both weed control and feeding effectiveness.
- Over-Application: Using too much product burns your grass. Always measure carefully.
- Temperature: Applying certain chemicals when the temperature is too high stresses the grass and reduces the product’s effectiveness.
User Experience and Use Cases
How easy is the product to use? When should you use it?
For beginners, granular products used with a standard spreader offer a simple, even application. Experienced gardeners might prefer liquids for spot-treating specific areas quickly.
Use Case 1: Spring Cleanup. Use a weed and feed with a pre-emergent ingredient early in the spring. This stops crabgrass before it starts while giving your lawn a boost as it wakes up.
Use Case 2: Summer Touch-Up. If dandelions pop up in July, use a post-emergent liquid spray. It targets visible weeds quickly without applying heavy fertilizer when the grass is already stressed by summer heat.
10 Frequently Asked Questions (FAQ) About Weed Killer Fertilizer
Q: How long until I see the weeds die?
A: Most post-emergent weed killers start showing results within 7 to 14 days. The fertilizer benefits happen over several weeks.
Q: Can I use this if I have pets?
A: Yes, but you must follow the re-entry instructions. Wait until the product dries completely, or wait the time specified on the label (usually 24 to 72 hours) before letting pets walk on the lawn.
Q: Does this product kill clover?
A: Many selective weed killers target broadleaf weeds, and clover is a broadleaf weed. Check the label to confirm clover is listed.
Q: What is the best time of year to apply this?
A: Early spring is ideal for pre-emergents. For post-emergents and feeding, apply when weeds are actively growing, usually when temperatures are between 60°F and 85°F.
Q: Will this product hurt my established flowers nearby?
A: If you use a selective product and apply it carefully, it should not hurt established plants. Drift (when spray moves) can cause damage, so avoid spraying on windy days.
Q: What is the difference between weed and feed and just fertilizer?
A: Fertilizer just feeds the grass. Weed killer fertilizer does both: it feeds the grass and actively kills the unwanted weeds simultaneously.
Q: How often should I apply weed killer fertilizer?
A: This depends on the product. Many standard weed and feeds are applied 2 to 4 times per year, following a seasonal schedule.
Q: My grass looks yellow after applying. What happened?
A: This is often called fertilizer burn. It happens when you use too much product or if the product was applied when the grass was very dry. Always measure carefully.
Q: Is granular or liquid generally better for lawns?
A: Granular products are easier for beginners to spread evenly across a large area. Liquids work faster but require careful spraying equipment.
Q: Do I need to water the lawn after spreading granular weed killer?
A: Yes, usually. The label will tell you to water lightly after spreading granular products. This helps move the chemicals down to the soil and activates the fertilizer.