Is your Texas lawn battling an army of unwanted invaders? You see those stubborn weeds popping up, turning your beautiful green space into a patchy mess. It’s frustrating! Texas weather, with its intense heat and sudden downpours, makes growing a perfect lawn tough enough without adding weed warfare to the mix.
Choosing the right weed killer adds another layer of confusion. Should you use a pre-emergent or a post-emergent? Will it harm your St. Augustine grass? These questions keep many homeowners up at night, worried about damaging their yard while trying to save it. Finding a product that actually works in our unique climate is the real challenge.
Don’t worry! This guide cuts through the confusion. We will break down the best weed killers specifically designed for Texas soil and common lawn types. You will learn exactly which products win the fight against common Texas weeds, keeping your grass healthy and green all season long.
Top Weed Killer For Texas Lawns Recommendations
- KILLS & PREVENTS WEEDS* UP TO 6 MONTHS: Kills broadleaf weeds*, including Dandelion, Clover, Chickweed and Henbit with a proven blend of weed killers *Listed
- CRABGRASS PREVENTION: Lawn weed killer prevents listed grassy and broadleaf weeds such as Crabgrass, Annual Bluegrass, Common Dandelion, Goosegrass and Spurge for up to 6 months
- IDEAL FOR SOUTHERN LAWNS: Improve your lawn care with this broadleaf pre-emergent weed control that treats up to 4,000 square feet of southern turf, including all varieties of St. Augustinegrass, including Floratam
- READY FOR THE SEASON: With one application, this weed killer and crabgrass preventer offers up to season-long weed control
- SIMPLE APPLICATION: Apply these BioAdvanced weed killer granules with a rotary or drop spreader and water lightly 24 hours after applying
- WEED KILLER SPRAY FOR LAWNS: With a simple hose-end application, kill weeds in your lawn, including dandelions, chickweed, clover, crabgrass and foxtail with Ortho WeedClear Lawn Weed Killer Ready-to-Spray
- FAST-ACTING WEED CONTROL: This weed killer hose sprayer kills listed weeds like crabgrass, dandelion, clover, chickweed and creeping charlie down to the root and gets results with 1 application
- COVERAGE: This 32 fl. oz. container of Ortho WeedClear Lawn Weed Killer Ready-to-Spray provides up to 5,000 sq. ft. of lawn care
- HOW TO USE: Apply to listed lawn weeds that are young and actively growing by connecting your garden hose to the weed killer sprayer, sliding the switch to "ON" and spraying evenly until the lawn is wet
- WHERE TO USE: This spray weed killer for lawns won't harm lawn grasses when used as directed - use on lawn grasses including Bermudagrass, Buffalograss, Fescues, Kentucky Bluegrass, Ryegrass and Zoysiagrass
- WEED KILLER PLUS LAWN FOOD: Scotts Turf Builder Weed & Feed3 weed killer plus fertilizer for grass kills existing listed weeds and feeds to thicken your lawn and crowd out future weeds
- WEED CONTROL FOR LAWNS: These weed killer plus lawn fertilizer granules control over 50 listed lawn weeds, including clover, dandelion, plantain, morningglory, chicory, eveningprimrose, and purslane
- WEED AND FEED FOR LAWNS: Apply this combination weed control 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
- USE ON LISTED GRASS TYPES: Apply this lawn care product to Bahiagrass, Bermudagrass, Bluegrass, Centipedegrass, Fescue, Ryegrass, and Zoysiagrass (temporary discoloration may occur on some grasses)
- DO NOT USE ON: Do not use this weed killer for lawns on St. Augustinegrass (including Floratam), Dichondra, Lippia, Carpetgrass, and Bentgrass lawns
- QUICK NITROGEN BOOST: Scotts Liquid Turf Builder with Plus 2 Weed Control is a weed killer and grass fertilizer for lawns that gives a quick boost of nitrogen while controlling weeds
- EASY-TO-USE: To apply the lawn food and weed killer spray, simply attach this hose-end applicator to your garden and spray lawn; apply when weeds are actively growing for best results
- BROADLEAF WEED KILLER: This weed killer for lawns with grass fertilizer targets buckhorn, chickweed, ground ivy, henbit, knotweed, lambsquarters, oxalis, pigweed, plantain, poison ivy, ragweed, and spurge
- KILLS LISTED WEEDS: This lawn weed killer plus fertilizer kills dandelions, clover, and other listed lawn weeds
- COVERAGE: Scotts Liquid Turf Builder with Plus 2 Weed Control 32 fl. oz. Ready-To-Spray covers up to 6,000 sq. ft. for warm season lawns and 4,000 sq. ft. for cool season lawns
- FAST-ACTING WEED CONTROL: This weed and grass killer spray absorbs on contact to produce results in just 15 minutes, allowing you to reclaim your outdoor spaces including walkways and driveways, under trees, and in landscape beds
- RAINPROOF IN 2 HOURS: Once dry, the formula becomes rainproof in 2 hours, ensuring that your efforts with the grass and weed killer sprayer are not washed away by unexpected weather
- WEED & GRASS KILLER: This grass and weed spray targets and kills listed weeds and grasses, including dandelions, chickweed, crabgrass, and moss, providing comprehensive coverage for your outdoor spaces
- EASY APPLICATION: This 1 gal. container of Ortho GroundClear Weed & Grass Killer includes an ergonomic Comfort Wand weed sprayer to easily target weeds you want to kill
- WHEN TO USE: For effective control and best results, use this OMRI Listed for Organic Use grass and weed killer sprayer with wand when weeds are small, actively growing and not wet from rain, dew or irrigation; not for use on lawns
- HOW TO USE: To use this weed control product, connect your garden hose to the weed killer hose sprayer, turn on the water and spray evenly over the area where you want to kill weeds
- WHERE TO USE: This weed spray kills listed weeds not lawns, and may be used on well-established cool-season and warm-season turf grasses
- LAWN WEED CONTROL: This lawn weed killer also controls wild violet and dollarweed, and selectively controls other listed sedge and broadleaf weeds, including dandelion, purslane and spurge
- NUTSEDGE KILLER: Kill nutsedge (nutgrass), kyllinga and over 50 other tough weeds with Ortho Nutsedge Killer for Lawns Ready-To-Spray1
- COVERAGE: This 32 fl. oz. container of Ortho Nutsedge Killer for Lawns Ready-To-Spray1 covers 5,000 sq. ft.
Your Guide to Winning the War on Weeds in Texas Lawns
Texas lawns face a tough battle. Hot sun, unpredictable rain, and stubborn weeds make lawn care a real challenge. Choosing the right weed killer is key to a beautiful, green yard. This guide helps you pick the best product for your Texas turf.
Key Features to Look For
When shopping for weed killer, look closely at what the label promises. These features matter most for Texas conditions:
- Selective vs. Non-Selective: Most homeowners need a selective killer. This means it kills weeds (like dandelions or clover) but leaves your desirable grass (like Bermuda or St. Augustine) unharmed. Non-selective killers, like glyphosate products, kill everything they touch.
- Pre-Emergent vs. Post-Emergent: Pre-emergents stop seeds from sprouting. You apply these early in the spring before weeds appear. Post-emergents kill weeds that are already growing. A good Texas strategy often uses both!
- Temperature Tolerance: Texas heat is extreme. Some chemicals stop working or even damage your lawn when temperatures soar above 85°F. Check the label for safe application temperatures.
- Rainfastness: How quickly does the product stick to the weed and dry? If rain washes it away too soon, you waste money and effort. Look for products that are “rainfast” within a few hours.
Important Materials: What’s Inside Matters
The active ingredients determine how the product works. You will usually see two main types of active ingredients:
Herbicides for Killing Weeds
These are the chemicals that do the work. Common ingredients for lawns include 2,4-D, Dicamba, and MCPP. These are usually found in liquid concentrates or ready-to-use sprays. Read the label to ensure the formula targets the specific weeds common in your area (like dollarweed or henbit).
Fertilizer/Weed & Feed Combos
Some products combine weed killer with fertilizer. This saves time. However, be careful. If your lawn does not need fertilizer right now, you might overfeed it. Only use these combos when your grass is actively growing and hungry for nutrients.
Factors That Improve or Reduce Quality
The quality of your weed killer is affected by how you use it and the product’s formulation.
Factors That Improve Quality:
- Concentrate Quality: Higher-quality concentrates often mix more evenly with water, leading to better coverage on the lawn.
- Adjuvants: Some formulas include “surfactants” or “adjuvants.” These help the spray stick to waxy weed leaves, making the killer more effective.
- Proper Timing: Applying pre-emergent when soil temperatures are right (usually mid-February to early March in many parts of Texas) greatly improves success.
Factors That Reduce Quality:
- Dilution Errors: Too little product means the weeds survive. Too much product can burn or kill your expensive turfgrass. Always follow mixing instructions exactly.
- Application Overlap: When spraying, overlapping your passes too much deposits too much chemical in one spot. This causes brown patches.
- Application During Stress: Applying strong herbicides when grass is already stressed by extreme drought or heat often damages the grass instead of just the weed.
User Experience and Use Cases
How easy is the product to use? This heavily impacts your long-term success.
Ready-to-Use vs. Concentrate
Ready-to-use (RTU) bottles are excellent for small yards or spot-treating tough weeds. You just attach the sprayer and go. They offer a great user experience for beginners.
Concentrates are better for large lawns. You mix them in a separate tank sprayer. While they require more setup, they save money over time.
Common Use Cases in Texas
- Spring Defense: Use a granular pre-emergent in late winter to stop summer weeds like crabgrass.
- Mid-Summer Spot Treatment: Use a liquid, selective post-emergent spray during cooler parts of the day (early morning) to manage broadleaf weeds that pop up during the hot months.
- Fall Cleanup: Use a targeted spray to kill perennial weeds before they go dormant for winter.
10 Frequently Asked Questions (FAQ) About Texas Weed Killers
Q: Can I use a weed killer when it is 95 degrees outside?
A: Generally, no. Most lawn herbicides become too harsh for grass when temperatures are that high. Wait for a cooler time in the early morning or evening, or wait for a cooler stretch of weather.
Q: How long until I can let my dog walk on the lawn after spraying?
A: This varies by product. Always read the label. Most liquid treatments require the lawn to dry completely, which usually takes one to four hours. Drying time keeps pets safe.
Q: Will a weed killer work on tough nutsedge (nutgrass)?
A: Standard weed killers often fail on nutsedge. You need a product specifically labeled to control nutsedge, often containing ingredients like sulfentrazone or halosulfuron.
Q: Do I need to water my lawn before or after applying weed killer?
A: For most post-emergents, the weeds should not be dusty or extremely dry. Lightly water the day before application. After application, avoid watering for the time specified on the label (usually 24 hours) so the product can work.
Q: What is the best time of year to apply pre-emergent?
A: In Central and South Texas, apply pre-emergent around Valentine’s Day or early March. In North Texas, aim for mid-February. This timing stops crabgrass before it starts.
Q: Does rain wash away weed killer effectiveness?
A: Yes, if it rains too soon. Look for products that become “rainfast” within two to four hours. If heavy rain is forecasted right after application, postpone spraying.
Q: Can I use the same sprayer for fertilizer and weed killer?
A: It is best not to. Residue from the weed killer can harm your grass the next time you spray fertilizer. Thoroughly clean the sprayer or use a separate one for herbicides.
Q: What should I do if my Bermuda grass turns yellow after spraying?
A: A slight yellowing (a temporary “stunt”) can happen if the temperature is high or you used a slightly high concentration. If the grass is completely brown, you may have used a non-selective killer or applied during extreme heat.
Q: Are organic weed killers effective in Texas?
A: Organic options, usually based on ingredients like vinegar or essential oils, work well on very small, young weeds. However, they often struggle against established, deep-rooted weeds common in the Texas heat.
Q: Do I need to mow before or after applying liquid weed killer?
A: Mow at least one day before spraying. Do not mow immediately after spraying. You need the weed leaves to be large enough to catch the spray droplets effectively.