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1Scan for outdated or missing drivers - takes under a minute2Clear out junk files and repair common Windows errors3Fix the driver behind crashes, sound loss and screen glitchesThere is no single weed killer that is best for every zoysia lawn. Choose by identifying the weed, deciding whether you need prevention or treatment, and checking that the exact product label permits use on zoysiagrass. Apply only when the lawn and weather meet the label’s conditions.
Start by identifying the weed
Herbicides are not interchangeable: a product aimed at broadleaf weeds may not control grassy weeds or sedges. NC State Extension lists summer broadleaf weeds such as white clover, knotweed, spurge and lespedeza, while treating crabgrass, goosegrass and sedges as separate weed problems. Use its zoysiagrass maintenance calendar to help distinguish the categories, then select a product labeled for the weed you actually have.
- Broadleaf weeds: Examples include clover, knotweed, spurge and lespedeza.
- Grassy weeds: Crabgrass and goosegrass require a product whose label lists the target.
- Sedges: Treat as a separate category; do not assume a broadleaf or crabgrass product will control them.
Choose prevention or treatment
A preemergence herbicide is intended to prevent weeds before they emerge. A postemergence herbicide is used on weeds that are already growing. The right choice depends on the weed and its stage, and a product must be labeled for both the target and zoysiagrass.
NC State Extension’s calendar recommends preemergence treatment in mid-February to early March in its North Carolina context, and postemergence treatment in May as needed for certain summer weeds. Those are regional guide dates, not universal timing for every climate. In summer, the guidance is to treat only when weeds are present, the grass is actively growing and the lawn is not drought-stressed.
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- 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 northern lawn grasses including Bermudagrass, Buffalograss, Fescues, Kentucky Bluegrass, Ryegrass and Zoysiagrass
Check the exact label for zoysia and timing
Before buying or applying anything, read the label on the exact container and formulation. NC State Extension advises: “Be sure the product you choose is labeled for use on zoysiagrass.” A similar product name or a different formulation may have different permitted turf, targets or directions. Follow the label for application rate, protective measures, weather conditions and any repeat interval.
Example: Spectracide Weed Stop for Lawns ready-to-spray
Spectracide lists its Weed Stop for Lawns ready-to-spray product for lawns including zoysia. This is an example of a manufacturer-listed option, not evidence that it is the best-performing product across weed types or regions. Verify the label on the product you have: the researched Weed Stop for Lawns Plus Crabgrass Killer 3 label warns, “Do not apply to zoysiagrass just emerging from dormancy, as it may result in lawn damage.” That warning applies to the named formulation and should not be generalized to every product in the Weed Stop line.
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- VISIBLE RESULTS IN 1 HOUR - Our fast-acting weed killer begins working in less than one hour. Simply spray weeds until thoroughly wet and watch them start to wilt quickly. Ideal for driveways, sidewalks, patios, landscape beds, rock beds, fence lines and other areas where unwanted weeds grow.
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- GREAT FOR AROUND YOUR HOME - Ideal for use on driveways, sidewalks, patios, walkways, rock beds, mulch beds, landscape beds, around trees, fence lines and other areas where weeds and unwanted grass grow.
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Time treatment for the lawn’s condition
Seasonal timing matters as much as the product name. Avoid postemergence applications when the turf is drought-stressed or not actively growing; do not apply the cited Spectracide formulation while zoysia is just emerging from dormancy. If the lawn is dormant, transitioning, recently damaged or under stress, pause and check the product label and local extension guidance before treating.
Some weeds may require more than one application, but do not infer a schedule from the weed alone. Use the selected product’s label for the rate, interval and maximum number of applications.
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- 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.
Prevent future weeds by protecting turf density
Herbicide is only one part of weed control. UF/IFAS notes that zoysia’s dense growth habit can resist weed invasion, while turf damage creates openings where weeds can establish. Its Florida zoysiagrass lawn guide provides regional guidance; local growing conditions and the exact cultivar still matter. Maintaining healthy, dense turf helps reduce opportunities for weeds to take hold.
Quick Recap
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- LAWN FRIENDLY FORMULA: Our lawn friendly weed killer spray formula contains three proven ingredients that specifically target common lawn weeds, so it won't harm your grass (when used as directed)
- EASY APPLICATION: The continuous spray Comfort Wand weed killer sprayer applicator makes it easy to apply for lawn care, allowing for precise spray control and maximum accuracy without any pumping required
- LAWN WEED CONTROL: Use Ortho WeedClear Weed Killer for Lawns with Comfort Wand, a lawn weed killer, to kill weeds down to the root without harming your grass (when used as directed), with visible results in hours
- KILLS OVER 250 WEEDS: This broadleaf weed killer for lawns targets over 250 common broadleaf lawn weeds, including dandelions, clover, poison ivy, chickweed, and dollarweed (see product label for complete weed list)
- FAST VISIBLE RESULTS: See visible results in hours; this lawn care formula that is rainproof in 1 hour after drying, and people and pets may re-enter the treated area after the spray has dried
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- KILLS WEEDS – NOT THE LAWN: When used as directed
- VISIBLE RESULTS IN 5 HOURS: Conquer unruly weeds and see visible results in as fast as 5 hours
- KILLS 470+ WEED TYPES AS LISTED: Kills broadleaf and grassy weeds including dandelion, chickweed and clover as well as crabgrass and yellow nutsedge – see product label for complete list of weed types
- KILLS THE ROOT: Kills weeds by contact down to the root
- READY-TO-USE FORMULA: No mixing required
A practical decision checklist
- Identify whether the problem is a broadleaf weed, grassy weed or sedge.
- Decide whether the weed has emerged; choose a labeled preemergence or postemergence approach accordingly.
- Confirm the exact product label lists both the target weed and zoysiagrass.
- Check that the lawn is in a condition allowed by the label and is not drought-stressed; avoid vulnerable dormancy-transition timing noted on the product label.
- Follow the container label for rates, application conditions and repeat treatments.
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