Does your beautiful Southern lawn look more like a patchwork quilt of green grass and unwelcome invaders? You spend hours watering, mowing, and caring for your yard, only to see stubborn weeds pop up everywhere. It’s frustrating! Dealing with weeds in the South presents unique challenges. Our hot, humid summers and mild winters mean weeds grow fast and fight hard to stay put.
Choosing the right weed control can feel like a guessing game. Should you use a pre-emergent, a post-emergent, or try a natural remedy? Wrong choices can harm your grass or simply waste your money. This guide cuts through the confusion. We will show you exactly how to identify common Southern weeds and pick the most effective, safe treatment for your specific lawn type.
Keep reading to unlock the secrets to a pristine, weed-free yard all year long. Let’s transform that patchy lawn into the envy of the neighborhood!
Top Weed Control For Southern Lawns Recommendations
- KILLS LISTED BROADLEAF WEEDS: Season Long Lawn Weed Killer + Preventer for Southern Lawns kills listed broadleaf weeds, including Dandelion, Clover, Chickweed, Dollarweed, and Henbit for up to 6 months
- PREVENTS WEEDS & CRABGRASS UP TO 6 MONTHS: Prevents listed grassy and broadleaf weeds, including Crabgrass, Annual Bluegrass, Common Dandelion, Goosegrass, and Spurge, for up to 6 months
- FOR SOUTHERN LAWNS: Treats up to 4,000 sq. ft. of southern turf, including all varieties of St. Augustinegrass, including Floratam; Also use on Bermudagrass, Centipedegrass, Zoysia, and more, as listed on the label
- SEASON-LONG WEED CONTROL: One application provides season-long control of over 50 listed lawn weeds; Apply these weed killer granules with a rotary or drop spreader and water lightly 24 hours after applying
- GET MORE FROM THE BLUE BOTTLE: From simple spot treatments to season-long protection, BioAdvanced science-based solutions make it simple to control unsightly weeds and protect against damaging diseases without harming the lawn, when used as directed
- FOR SOUTHERN LAWNS: 3-In-1 Weed and Feed is specially formulated to target types of weeds found in Southern lawns, like Bermudagrass, St. Augustinegrass and more
- PREVENTS NEW WEEDS UP TO 6 MONTHS: One application prevents listed weeds for up to 6 months; Apply when temperatures are between 50 and 90 degrees and weeds are actively growing
- KILLS SOUTHERN WEEDS: Kills Dandelion, Dollarweed, Clover, and other listed broadleaf weeds
- 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 science-based solutions make it simple to control unsightly weeds, feed your lawn, and protect against damaging diseases without harming the lawn, when used as directed
- FIRE ANT KILLER: This lawn fertilizer, weed killer, and outdoor ant killer prevents and kills fire ants for up to 6 months, and prevents armyworms, fleas, mole crickets, chinch bugs, sod webworms, and ticks
- 3-IN-1 LAWN CARE PRODUCT: Scotts Turf Builder Southern Triple Action is a 3-in-1 formula for Southern grass that kills listed weeds, prevents and kills fire ants, and includes a grass fertilizer to feed and strengthen your lawn against heat and drought
- KILLS LISTED LAWN WEEDS: Built-in lawn weed killer controls dollarweed, dandelion, clover, oxalis, plantain, chickweed, and henbit
- WHERE TO USE: Apply combination weed killer, insect preventer, and fertilizer to St. Augustinegrass (including Floratam), Centipedegrass, Zoysiagrass, and Carpetgrass
- COVERAGE: One 13.32 lb. bag of Scotts Turf Builder Southern Triple Action covers 4,000 sq. ft.
- 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.
- Lawn weed killer sprayer kills the weeds and won't harm lawns when used as directed
- Fast-acting weed killer for lawn, with visible results in hours
- This weed killer for St. Augustine grass was designed for Floratam lawns and fits easily into everyday lawn care
- Weed killer for lawns kills the toughest weeds-down to the root
- A broadleaf weed killer for lawns that controls tough broadleaf weeds in southern grasses including St. Augustinegrass, Bermuda, Zoysia, and Centipedegrass
- KILLS 460+ WEEDS AS LISTED: Kills all types of listed broadleaf weeds including dandelion, chickweed, clover and yellow nutsedge.
- VISIBLE RESULTS: This product will give you visible results in 3 hours.
- KILLS BY CONTACT: Spectracide Weed Stop For Lawns Concentrate2 kills by contact and kills weed roots.
- WHERE TO USE: Use this product on lawns – treats bluegrass, fescue, zoysia, Bermuda and perennial ryegrass.
- Do not apply to zoysiagrass just emerging from dormancy.
- WHEN TO USE: Use this lawn weed killer sprayer to treat small, actively growing weeds when daytime temperatures are below 90°F (and are not expected to exceed 90°F for 6 hours)
- HOW TO USE: This 1 gal. container of Ortho WeedClear Weed Killer for Lawns Ready-to-Use1 comes with the continuous-spray Comfort Wand weed sprayer to easily spot treat weeds in your lawn
- KILLS LAWN WEEDS: Ortho WeedClear Lawn Weed Killer Ready-To-Use1 weed killer for lawns kills listed weeds including dandelion, dollarweed, chickweed, and clover without harming your lawn (when used as directed)
- FAST-ACTING WEED CONTROL: This broadleaf weed killer for lawns kills over 250 weeds (see label for complete list) and produces results in hours
- WHERE TO USE: Use this lawn weed control product to kill weeds in southern lawns including Bahiagrass, Bentgrass, Bermudagrass (hybrid and common), Buffalograss, Centipedegrass, Fescue, Kentucky Bluegrass, Zoysiagrass, and St. Augustinegrass (except Floratam)
- KILL WEEDS NOT YOUR LAWN: Use Ortho WeedClear Weed Killer for Lawns Ready-To-Spray weed killer sprayer to kill weeds down to the root, without harming your lawn (when used as directed); you'll see visible results in hours
- HOW TO USE: To apply this herbicide weed killer, connect your garden hose to the sprayer, slide the switch to 'ON' to begin spraying; visible results in hours; rainproof in 1 hour upon drying; people and pets may enter the treated area after dried
- LAWN FRIENDLY: This weed spray contains three proven ingredients that target common lawn weeds, so it won't harm your grass (when used as directed)
- LAWN WEED KILLER: This broadleaf weed killer for lawns kills over 250 common broadleaf weeds, including dandelions, clover, poison ivy, chickweed, and dollarweed (see product label for complete weed list)
- COVERAGE: One 32 fl. oz. container of Ortho WeedClear Weed Killer for Lawns Ready-to-Spray provides lawn care for up to 16,000 sq. ft. for Southern lawns or 8,000 sq. ft. for Northern lawns
Your Essential Buying Guide for Weed Control in Southern Lawns
Southern lawns face tough challenges. Hot summers and humid weather mean weeds grow fast. Choosing the right weed control product keeps your grass green and healthy. This guide helps you pick the best solution for your yard.
Key Features to Look For
When shopping, check the label closely. Good weed control products have specific features that make them work well in the South.
1. Weed Type Targeting
- Broadleaf Weeds: These are weeds with wide leaves, like clover or dandelions. Make sure the product kills these.
- Grassy Weeds: These look like grass but are weeds, such as crabgrass. You need a product that targets grassy invaders too.
2. Pre-Emergent vs. Post-Emergent
- Pre-Emergent: This stops seeds from sprouting. Apply this early in the spring before the weeds appear. It acts like a shield.
- Post-Emergent: This kills weeds already growing. Use this when you see visible weeds.
3. Grass Safety
The product must not harm your established lawn. Southern grasses like Bermuda, Zoysia, or St. Augustine need specific care. Always check that the label states it is safe for your grass type.
Important Materials in Weed Killers
The active ingredients are what do the heavy lifting. Different chemicals target different weeds.
Common Active Ingredients
- For Pre-Emergents: Look for ingredients like Prodiamine or Dithiopyr. These create a barrier in the soil.
- For Post-Emergents: Products often use 2,4-D, Dicamba, or MCPP. These chemicals attack the weed’s system, causing it to die.
Important Note on Formulation
You will find products in liquid or granular form. Granular products spread easily using a spreader. Liquid products mix with water and spray on. Choose the format that fits how you prefer to treat your lawn.
Factors That Improve or Reduce Quality
The quality of the product matters greatly for long-term success.
Factors That Improve Quality
- Slow Release: Products that release ingredients slowly offer longer protection. This means fewer applications.
- Rainfastness: Good products stick to the weed or soil quickly after watering or rain. This prevents the chemical from washing away.
Factors That Reduce Quality
- Low Concentration: Cheap products sometimes have weak amounts of active ingredients. They do not kill tough Southern weeds effectively.
- Temperature Sensitivity: Some chemicals become less effective or even harmful to your grass if applied when temperatures are too high (above 90°F). Always follow the temperature guidelines.
User Experience and Use Cases
How easy the product is to use affects whether you will stick with a routine.
Ease of Application
Look for user-friendly packaging. Some containers have built-in spreaders or sprayers. This saves you time buying extra tools. Simple measuring instructions help prevent over- or under-application.
Use Cases for Southern Lawns
- Spring Preparation: Use a pre-emergent early, usually when soil temperatures reach 50-55°F, to stop crabgrass before it starts.
- Mid-Summer Spot Treatment: Keep a post-emergent liquid handy for quick touch-ups on stubborn weeds during the hot months.
10 Frequently Asked Questions (FAQ) About Southern Weed Control
Q: When should I apply pre-emergent weed control in the South?
A: Apply pre-emergent early in the spring, usually before flowering trees bloom, to stop crabgrass seeds from sprouting.
Q: Can I use the same product for clover and crabgrass?
A: Maybe, but often you need a combination product or two separate applications. Clover is a broadleaf weed; crabgrass is a grassy weed.
Q: How long after applying weed killer can my dog go outside?
A: Check the label! Most products require pets and people to stay off the lawn until the treated area is completely dry. This is usually a few hours.
Q: What is the biggest mistake people make when using weed control?
A: The biggest mistake is applying pre-emergent too late. If you see the weeds, it is already too late for the pre-emergent to work.
Q: Do I need to water after applying granular weed control?
A: Yes. Watering lightly activates the chemicals in granular products so they can start working in the soil.
Q: Is it better to use liquid or granular weed killer?
A: Neither is strictly better. Granular spreads easily over large areas. Liquid often provides faster results on existing weeds.
Q: Will weed killer harm my St. Augustine grass?
A: Only if you use the wrong product. Always confirm the label says it is safe for St. Augustine, as this grass type is sensitive to some chemicals.
Q: How often should I treat my lawn for weeds in the summer?
A: For existing weeds (post-emergent), treat when you see them pop up. For prevention, reapply pre-emergent based on the product’s instructions, usually every 8 to 12 weeks.
Q: Can I fertilize and apply weed control at the same time?
A: Many combination products exist. If using separate products, check if the manufacturer allows simultaneous application. Sometimes, it is best to wait a week between treatments.
Q: Why are my weeds coming back after treatment?
A: Weeds may return because you treated during extreme heat, the product washed away, or the product only killed the top growth, not the roots.