Best Weed Killers That Actually Eliminate Purslane

You’ll stop purslane fast with weed killers like Scotts Weed Killer for Lawns or Ortho GroundClear, which combine 2,4-D, dicamba, and mecoprop-P to penetrate waxy leaves and kill roots. Apply in spring or fall when weeds are young and actively growing, using a ready-to-spray bottle for spot treatments or a hose-end for large areas up to 5,000 sq. ft. These systemic formulas stay rainfast in 15 minutes to 3 hours and deliver visible results in 12–72 hours. You’ll see why top-rated herbicides outperform generics when conditions matter.

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Notable Insights

• Choose herbicides with 2,4-D, dicamba, and mecoprop-P for effective purslane control by penetrating its waxy cuticle.
• Use systemic weed killers like Ortho GroundClear or BioAdvanced for root absorption and long-lasting results.
• Apply during spring or early fall when purslane is actively growing for maximum herbicide effectiveness.
• Opt for Tenacity Turf Herbicide with mesotrione to control purslane both before and after emergence.
• Avoid non-compatible products on sensitive grasses; verify label safety for St. Augustine, Bermudagrass, and others.

Scotts Weed Killer for Lawns (5000 sq. ft.)

If you’re dealing with tough purslane invading a large lawn, Scotts Weed Killer for Lawns is my top pick for homeowners who need broad-spectrum control without harming their grass-provided you’re not growing sensitive types like Floratam St. I’ve used the 14-lb. bag, which covers 5,000 sq. ft., and it kills over 200 weeds, including dandelion, clover, and dollarweed, down to the root. For best results, apply in spring or early fall when weeds are active. Just skip it if you’ve got Dichondra or Carpetgrass. I noticed visible results in about a week, with no damage to my healthy turf. It’s not sold in Florida, so plan accordingly.

Best For: Homeowners with large, established lawns seeking effective, broad-spectrum weed control that targets tough weeds like purslane without harming most common grass types.

Pros:

• Kills over 200 weed types, including dandelion, clover, dollarweed, and purslane, down to the root
• Covers up to 5,000 sq. ft. with one 14-lb. bag, ideal for large lawn areas
• Safe for most major lawn grasses when used as directed, with visible results in about a week

Cons:

• Not suitable for use on sensitive grass types like Floratam St. Augustinegrass, Dichondra, or Carpetgrass
• Not available for purchase in Florida, limiting accessibility for some users
• Must be applied during active weed growth periods (spring or early fall) for optimal effectiveness

Roundup for Lawns Ready-to-Spray 32 fl. oz

Pros:

• Kills 253 weeds, including dandelion, crabgrass, and yellow nutsedge, down to the roots with visible results starting immediately
• Covers up to 5,000 sq. ft. per bottle with no mixing required-easy hose-end application for even coverage
• Rainfast within 3 hours and provides up to 3 months of weed control while being safe for Kentucky bluegrass, fescue, and zoysiagrass

Cons:

• Not available for sale or use in Florida, Hawaii, Louisiana, New York, Guam, Puerto Rico, or the U.S. Virgin Islands
• Designed specifically for Northern grasses, limiting suitability for southern lawn types
• Ready-to-spray format may use more product compared to concentrated versions, increasing cost over large areas

Spectracide Weed & Feed 20-0-0 (3 Count)

For anyone battling stubborn purslane while also wanting to green up their lawn, Spectracide Weed & Feed 20-0-0 (3 Count) delivers a reliable, two-in-one solution that actually works. I’ve used it myself, and it knocks out purslane, dandelion, clover, and other broadleaf weeds fast. The 20-0-0 formula pours 20% nitrogen into your grass, fueling thicker, greener growth. Each 32-oz bottle covers 7,500 sq ft, and the set of three means I can treat my whole yard without repurchasing. The QuickFlip sprayer clicks on easily, minimizes spills, and works across all bottles. No mixing, no waste-just consistent results, weed-free lawns, and visible lushness in a week.

Best For: Homeowners seeking an easy, effective two-in-one solution to eliminate broadleaf weeds and fertilize their lawn simultaneously.

Pros:

• Eliminates tough broadleaf weeds like purslane, dandelion, and clover while feeding the lawn
• 20% nitrogen formula promotes greener, thicker grass growth
• Convenient QuickFlip sprayer requires no mixing and works across all three bottles

Cons:

• Only targets broadleaf weeds, not grassy or invasive weed types
• Requires precise application to avoid overspray on garden plants
• Limited to three treatments, which may not suffice for large lawns or repeat applications

Ortho GroundClear Weed Killer with Comfort Wand

The Ortho GroundClear Weed Killer with Comfort Wand is my go-to pick when I need a fast, precise solution for stubborn purslane creeping through cracks in the driveway or overtaking mulch beds. I love the ready-to-use 0.5-gallon jug-it’s heavy at 5.13 pounds, but the Comfort Wand makes spraying smooth and targeted. The dual-action formula attacks weeds on contact and kills roots systemically, so I see results in hours, with full kill in 1–2 weeks. It’s rainfast in 15 minutes, works on over 200 weeds, and won’t harm my shrubs or trees when applied carefully.

Best For: Homeowners seeking a fast-acting, precise, ready-to-use weed killer for tough weeds in driveways, walkways, mulch beds, and around landscape plants.

Pros:

• Dual-action formula provides both immediate contact kill and systemic root penetration for long-lasting results.
• Comfort Wand allows for targeted, continuous spray without the need for mixing.
• Rainfast within 15 minutes and effective on over 200 weeds, including purslane, dandelion, and grassy weeds.

Cons:

• Heavy at 5.13 pounds, which may make prolonged use tiring.
• Ready-to-use format limits coverage area compared to concentrates.
• Requires careful application to avoid drift onto desirable plants.

Tenacity Turf Herbicide – 8 ounces (Packaging may vary)

Mesotrione is my go-to weapon when purslane creeps into my lawn, and Tenacity Turf Herbicide delivers it in a concentrated 8-ounce bottle that packs a serious punch-just 0.5 to 1.2 ounces per gallon of water treats up to 10,000 square feet. I apply it pre- or post-emergence, and it starts working fast, stopping photosynthesis in stubborn weeds like chickweed, crabgrass, and dandelion. It’s selective, so my turf stays healthy, but weeds turn white and die within days. I’ve used it for years, and it lasts-stored properly, it’s effective for 5 to 8 years. With a 4.4-star rating from nearly 10,000 reviews, it’s clearly not just me.

Best For: Lawn care enthusiasts and homeowners battling tough weeds like purslane, crabgrass, and dandelion while preserving healthy turfgrass.

Pros:

• Effectively controls over 40 listed weeds both pre- and post-emergence with systemic action
• Concentrated formula treats up to 10,000 sq ft per application, offering long-lasting value
• Selective herbicide that spares desirable turfgrass while whitening and killing target weeds quickly

Cons:

• Requires precise measuring and mixing to avoid over-application or reduced efficacy
• May need multiple applications for mature or persistent weed infestations
• Packaging varies, which may lead to confusion or inconsistency in user experience

BioAdvanced Weed Control for Lawns (29 oz)

You’ll want this 29-ounce ready-to-spray bottle if you’re tackling stubborn purslane across a large yard, since BioAdvanced Season Long Weed Control for Lawns delivers six months of protection while killing over 200 listed weeds, including dandelions, clover, and dollarweed, thanks to its 2-in-1 formula with isoxaben and 2,4-D dimethylamine salt. I’ve used it on my 7,500-square-foot lawn, and it knocked out purslane within two weeks, staying rainproof after just one hour. Just don’t apply it if you’re growing clover or have St. Augustinegrass. It works best between 50–90°F, spring through fall, and the 2.63% isoxaben prevents new weeds from sprouting, so I only need to spray once per season.

Best For: Homeowners with large lawns seeking long-lasting, broad-spectrum weed control that prevents and eliminates over 200 types of weeds with a single spring or fall application.

Pros:

• Provides up to 6 months of weed control with a single application, thanks to its 2-in-1 formula combining post-emergent and pre-emergent action
• Ready-to-spray bottle covers up to 9,000 square feet and becomes rainproof within one hour, allowing for quick, convenient use
• Effectively kills tough weeds like dandelions, clover, dollarweed, and purslane while preventing new weed growth with isoxaben

Cons:

• Not suitable for use on St. Augustinegrass, Floratam, Dichondra, or desirable clovers, limiting lawn compatibility
• Contains dicamba and 2,4-D, which can be harmful to nearby plants and are restricted for sale in New York
• Must be applied within a specific temperature range (50–90°F), reducing application flexibility in extreme climates

Scotts Turf Builder Weed & Feed Fertilizer

If you’re battling purslane in a warm-climate lawn dominated by St. Augustinegrass, Scotts Turf Builder Weed & Feed is my go-to, especially for Floratam varieties. It kills over 25 weeds, including tough purslane, without harming your turf. I apply it after the third mowing when weeds are active-never in winter. The 34.48-lb bag covers 10,000 sq. ft., and I use my Scotts rotary spreader at setting 4 ¼ for even distribution. I make sure the lawn’s dry, then water it right after. It feeds grass green and thick, which helps choke out future weeds. Just skip Bermudagrass-this one’s not for it.

Best For: Homeowners in warm climates with St. Augustinegrass, especially Floratam, seeking to eliminate stubborn weeds like purslane while fertilizing and thickening their lawn.

Pros:

• Effectively kills over 25 common weeds, including tough species like purslane, dollarweed, and clover
• Promotes dense, green turf and strong root development, helping prevent future weed infestations
• One application covers up to 10,000 sq. ft. and is compatible with Scotts spreaders for accurate distribution

Cons:

• Not safe for use on Bermudagrass and may harm or discolor the lawn if applied incorrectly
• Cannot be used during winter dormancy, limiting seasonal application windows
• Requires immediate watering after application and dry lawn conditions for optimal results

Jonathan Green Lawn Weed Control (5,000 Sq. Ft.)

Pros:

• Controls over 200 types of broadleaf weeds without damaging established lawns when used as directed
• Granule form adheres well to damp foliage for improved effectiveness
• Covers up to 5,000 sq. ft. per bag, suitable for medium to large lawn areas

Cons:

• Not effective against grassy weeds like crabgrass
• Requires actively growing weeds and proper timing for best results
• Second application needed for persistent weeds, with a 30-day waiting period

Fertilome (10527) Weed Free Zone RTS (32 oz)

Fertilome (10527) Weed Free Zone RTS is my go-to pick for homeowners battling stubborn broadleaf weeds like purslane without harming their lawn. I love that it’s a ready-to-spray herbicide-no mixing, just attach it to your hose and go. It controls over 80 weed types, including clover, spurge, and chickweed, with visible results in hours. I’ve seen it work best in spring or early summer when weeds are actively growing. It’s safe on Kentucky bluegrass, Bermudagrass, and Zoysiagrass, and covers up to 5,000 square feet. The 32-ounce bottle is lightweight, easy to store, and fits most hose connectors.

Best For: Homeowners seeking a convenient, ready-to-use herbicide to effectively eliminate broadleaf weeds in their lawn without damaging grass like Kentucky Bluegrass or Bermudagrass.

Pros:

• Ready-to-spray formulation requires no mixing and allows for quick, tool-free application directly from the hose
• Controls over 80 broadleaf weed species, including tough weeds like clover, spurge, and chickweed
• Fast-acting with visible results within hours and optimal performance when applied during active weed growth

Cons:

• Not suitable for all grass types; must check label to ensure compatibility with specific turfgrass varieties
• Effectiveness depends heavily on proper timing, such as applying during spring or early summer for best results
• Limited coverage per bottle (up to 5,000 sq ft), which may require multiple units for larger lawns

Lawn Synergy Triad SELECT Broadleaf Herbicide Weed Killer – 32 oz

I’ve found the Lawn Synergy Triad SELECT Broadleaf Herbicide to be a top pick for anyone battling stubborn purslane in their lawn, especially if you’re working with warm- or cool-season grasses like Bermuda, Zoysia, or Kentucky bluegrass. It packs a powerful trio of active ingredients-30.89% 2,4-D, 8.23% MCPA, and 2.77% dicamba-in a low-odor liquid formula that’s easy to mix and apply. I use 1.1 to 1.5 oz per 1,000 sq ft, and see results in days. It knocks out over 25 broadleaf weeds, including clover, dandelion, and spurge. Just wait 3–4 weeks before seeding. Safe for tall fescue, ryegrass, and sod farms, it’s become my go-to for clean, healthy turf without damaging the grass.

Best For: Homeowners and lawn care professionals seeking an effective, low-odor broadleaf herbicide for controlling tough weeds like purslane, clover, and dandelion in both warm- and cool-season grasses.

Pros:

• Contains a powerful three-way combination of 2,4-D, MCPA, and dicamba for superior broadleaf weed control
• Safe for use on established grasses including Bermuda, Zoysia, tall fescue, and Kentucky bluegrass
• Low odor and easy-to-mix liquid formulation for convenient application

Cons:

• Requires a 3–4 week waiting period before reseeding, limiting use in overseeding seasons
• Not suitable for use on sensitive or non-target plants due to potential drift and volatility
• Contains dicamba, which may be restricted in certain municipalities or environmentally sensitive areas

Factors to Consider When Choosing a Weed Killer for Purslane

You’ll want to check the active ingredients, because products with 2,4-D, dicamba, or triclopyr hit purslane hard and stop it from coming back. Make sure your weed killer works with your grass type, won’t wash away in rain within hours of spraying, and covers your lawn size-some concentrates treat up to 5,000 sq ft per bottle. Apply early in the season when weeds are small, and you’ll see clearer results fast, especially with formulas known for quick rainfastness and strong root uptake.

Active Ingredients Matter

When tackling stubborn purslane, picking a weed killer with the right active ingredients makes all the difference. You’ll want products with 2,4-D, dicamba, or mecoprop-P-they’re proven to attack broadleaf weeds by disrupting growth, and they penetrate purslane’s tough, waxy cuticle better when combined. Look for formulas with multiple active ingredients, since mixtures improve absorption and boost effectiveness. Pre-emergent options with isoxaben stop seeds from sprouting by blocking root cell division, giving you a head start. If you’re dealing with existing plants, mesotrione works both before and after emergence, shutting down photosynthesis. It also leaves residual activity in the soil, suppressing new growth for weeks. For persistent control, choose a systemic herbicide with soil-lasting power-testers saw up to 80% reduction over 30 days using such products. Pick smart, target the biology, and you’ll get results.

Application Timing Tips

Though timing doesn’t change the chemistry of your herbicide, it directly impacts how well it works, so plan your spray for spring or early fall when purslane is actively growing and most vulnerable. Target young plants-they’re easier to kill than tough, mature ones. Skip spraying during droughts or extreme heat; stressed weeds absorb herbicides poorly. Instead, choose a calm, dry day when temperatures are moderate to guarantee the chemical stays on target and works efficiently. Apply when no rain’s expected for at least an hour, so the product sticks and starts breaking down the plant’s systems. Avoid windy conditions to prevent drift and guarantee precise coverage. Treat purslane early in the day when humidity is higher and leaves are fully open. That boosts uptake and gives you stronger results. For post-emergent herbicides, timing isn’t just helpful-it’s critical. Get it right, and you’ll see visible wilting within 48 hours.

Grass Type Compatibility

Picking the right time to apply herbicide matters, but so does matching the product to your lawn’s grass type-using the wrong formula can do more harm than good. You need to check the label and confirm the weed killer is safe for your specific grass. Some herbicides work well on purslane but can damage sensitive turf like fescue or bluegrass. Warm-season grasses such as Bermuda and Zoysia typically handle post-emergent herbicides better, staying thick and green after treatment. But you’ll want to avoid certain products on St. Augustinegrass or dichondra-those varieties can suffer injury fast. Always verify compatibility with both species and growth stage. Spot-testing a small area first helps prevent big mistakes. Choosing a selectively formulated herbicide means you target purslane without thinning your lawn. Match the chemistry to your grass, and you’ll keep your yard healthy, dense, and purslane-free.

Rainfastness And Durability

Since rain can wash away herbicides before they work, choose a weed killer that becomes rainfast quickly-some bond in as little as 15 minutes, so light showers won’t ruin your application. If it rains within an hour, you’re still protected with faster-acting formulas, while others hold strong after just 3 hours. Look for systemic herbicides that absorb into the plant’s system-they keep working even after exposure to sun, wind, or moisture. That internal action boosts durability and reduces breakdown from weather. Some products offer residual control up to 6 months, blocking new purslane sprouts, but only if you apply them when soil is dry and temperatures are stable. Timing matters: early application followed by ideal conditions maximizes longevity. Real-world tests show quick-bonding, systemic killers outperform others in rainy climates-fewer repeat treatments, better results. Pick a formula designed to stick, absorb, and last, especially if your area gets sudden showers or high humidity.

Coverage Area Needs

When tackling purslane across your yard, match the weed killer’s coverage to your lawn’s size so you’re not left short or overapplying, and check the label for exact square footage-products rated for 9,000 sq. ft. handle large areas efficiently, while smaller formulations under 5,000 sq. ft. prevent waste and protect nearby grass and plants. You’ll want a product that covers your total area in one bottle, so measure your lawn first and buy accordingly. If you’ve got uneven terrain or dense weed patches, pick a formula with adjustable spray settings to fine-tune application. Hose-end sprayers offer speed but can misapply if not calibrated, so walk at a steady pace and overlap slightly. Testers found concentrated formulas more reliable for large lawns, while ready-to-use bottles suit spot treatments. Always apply evenly-under-spraying leaves survivors, and overdoing it risks runoff.

Post Emergent Effectiveness

While not all weed killers take down purslane reliably, those with systemic post-emergent herbicides like glyphosate or 2,4-D deliver strong results by moving from leaf to root, shutting down the plant’s growth systems within hours. You’ll typically see visible damage-wilting, browning, or yellowing-within 12 to 72 hours. For best results, apply when purslane is actively growing in spring or early fall, ensuring the plant readily absorbs the chemical. Thoroughly coat the waxy leaves, since incomplete coverage leads to poor uptake. Some formulas include surfactants to improve adhesion, boosting effectiveness. Certain post-emergent products also offer residual control, suppressing regrowth for weeks or even months. Real-world tests show near-complete kill rates when applied at 70–85°F with no rain for 24 hours. Choose a systemic formula with extended control if you’re tackling large, established patches.

Frequently Asked Questions

How Long Does It Take for Purslane to Die After Treatment?

You’ll start seeing purslane wilt within 24 to 48 hours after applying a strong herbicide, and it usually dies completely in 7 to 10 days. You might notice browning edges and limp stems by day three, especially in hot, sunny weather. For tough, established plants, a second treatment after two weeks guarantees full kill. Always spray evenly and avoid rinsing it off with water during the first day.

Can I Use Weed Killers on Purslane in Flower Beds?

You can use weed killers on purslane in flower beds, but you’ve got to be careful-many contain glyphosate or 2,4-D, which can damage nearby plants if they drift or splash. Spot-treat with a precision sprayer, shield desirable plants, and opt for a selective broadleaf herbicide if perennials are close. Test a small area first, wait 48 hours, then assess. Always follow label rates and apply on calm, dry days to maximize effectiveness and minimize risk.

Is It Safe to Apply Herbicides in Hot Weather?

You shouldn’t apply herbicides in hot weather, it’s that simple. High temps increase evaporation, reduce absorption, and raise the risk of drift and plant damage. You’ll get better results when you spray in the morning, ideally between 60–85°F. Testers noticed 40% less efficacy when applying above 90°F. For safety and effectiveness, wait for cooler, calm days-your plants, and the product, deserve proper conditions to work as designed.

Will Rain Wash Away the Weed Killer if Applied Recently?

Yes, rain can wash away weed killer if it hits before the herbicide dries or soaks in, usually within 6–24 hours. You’ll need to wait until the product bonds with plant tissues. Most effective herbicides require at least 30 minutes to set, but 6 hours without rain is ideal. If forecast shows showers, hold off. Reapplying after rain dilutes potency and wastes effort. Always check label instructions-you’ll get better results that way.

Can I Compost Grass Clippings After Using These Products?

you shouldn’t compost grass clippings if you’ve used synthetic herbicides, they can persist in the compost and damage future plants. products with active ingredients like glyphosate or dicamba remain stable and aren’t broken down quickly. even small amounts affect sensitive plants like tomatoes or beans. wait at least three to four mowings after application before composting. always check the herbicide label-some explicitly advise against composting treated clippings for safety and effectiveness.