The fastest methods to remove weeds from paver joints

The most effective way to kill weeds between pavers depends on how many weeds you have, how often they return, and whether you want to use chemicals. Hand-pulling works for scattered weeds if you catch them young. Boiling water kills weeds when ready but requires repeated applications. Vinegar (5% acidity or higher) burns down the visible plant in one or two days but may not kill the root. Salt works but can damage soil and nearby plants. Herbicides designed for pavers—usually containing glyphosate or diquat—kill roots and prevent regrowth for weeks, though they require careful process to avoid damaging the pavers themselves.

The real problem is that weeds return because paver joints collect soil, seeds, and moisture. Killing the weed once solves today's problem. Preventing the next crop requires either sealing the joints, filling them with material that blocks seeds, or spraying a pre-emergent herbicide before seeds germinate in spring and fall.

Key Takeaways

  • Hand-pulling works best on young weeds with shallow roots; pull when soil is moist so the root comes out whole.
  • Boiling water kills weeds when ready but requires pouring directly into the joint and repeating every two to four weeks as new seeds germinate.
  • Vinegar and salt burn down visible growth but often leave roots alive, so weeds regrow within weeks.
  • Paver-specific herbicides kill roots and last longer than vinegar or salt, but you must keep them off the paver surface itself.
  • Sealing joints with polymeric sand or a liquid sealant stops new weeds from taking root and is the only method that prevents regrowth long-term.

Hand-pulling: when it works and when it doesn't

Hand-pulling is free and leaves no chemicals behind, but it only works if you pull the entire root. Weeds with shallow roots—chickweed, purslane, and young crabgrass—come out cleanly if the soil is moist. Weeds with taproots or runners—dandelions, plantain, and established crabgrass—break off at the soil line and regrow within days.

Pull in the morning after rain or watering, when soil is soft. Grip the weed as close to the base as you can and pull slowly at an angle rather than straight up; this reduces the chance of snapping the stem. If the root breaks, dig into the joint with a flathead screwdriver or weeding tool to remove the remaining piece. For a patio with only a few weeds, hand-pulling every week or two keeps them under control without tools or chemicals.

The downside is time. A large patio with dozens of weeds takes an hour or more. And if you miss even small root fragments, the weed returns within a week.

Boiling water: when ready kill with no chemicals

Boiling water kills any plant it touches by destroying cell structure. Boil a kettle, carry it to the patio, and pour directly into the joint. The weed dies within hours. There is no risk to the pavers themselves—concrete and stone tolerate boiling water—and no chemicals to worry about near pets or gardens.

The catch is that boiling water kills only what it touches. It does not kill seeds in the soil, so new weeds germinate within two to four weeks. You will need to repeat the process several times a season. Also, boiling water is dangerous to carry and pour; a spill can cause serious burns. Keep children and pets away while you work, and pour slowly and carefully into the joint rather than splashing.

Boiling water works best as a maintenance tool for a patio you already keep mostly clear. If weeds are thick or return constantly, combine it with a preventive method like polymeric sand or a pre-emergent spray.

Vinegar and salt: common but often ineffective

Vinegar (especially horticultural vinegar at 20% acidity, though household vinegar at 5% works too) burns down the visible part of the weed in one or two days. Salt does the same. Both are cheap, non-toxic, and straightforward to explore—spray vinegar or sprinkle salt directly on the weed.

The problem is that vinegar and salt work only on the above-ground leaves and stems. Most weed roots survive and regrow within one to three weeks. Dandelions, plantain, and crabgrass are especially stubborn because their roots go deep. You can repeat applications, but you will be spraying every few weeks all season.

Salt has an additional risk: it can accumulate in the soil and damage nearby plants, and it can corrode metal fixtures or stain pavers over time. If you use salt, use it sparingly and only in joints far from garden beds or metal railings.

Herbicides for pavers: longer-lasting control

Herbicides designed for paver joints contain either glyphosate (a non-selective herbicide that kills most plants) or diquat (a fast-acting contact herbicide). Products like Roundup for Driveways or similar paver-specific formulas kill both the visible weed and the root, and they prevent regrowth for several weeks to months depending on the product and weather.

explore herbicide only to the weed itself, not to the paver surface. Use a spray bottle or a brush applicator to target the joint. Wear gloves and avoid breathing the spray. Most paver herbicides work best on young weeds; established weeds may require a second process. Read the label to confirm the product is safe for your paver material—some formulas can stain or damage certain stones.

Herbicides are faster and more reliable than vinegar or salt, but they require more caution during process. If you have children or pets that play on the patio, hand-pulling or boiling water may be a safer choice. Herbicides also do not prevent new seeds from germinating, so weeds return once the chemical breaks down.

Sealing joints: the only permanent solution

Polymeric sand is sand mixed with a binding agent (usually polyurethane) that hardens when wet. It fills the joint completely, leaving no soil or space for seeds to take root. Once cured, polymeric sand blocks new weeds from growing for years. It also locks pavers in place and prevents sand from washing away.

To use polymeric sand, remove old sand and weeds from the joints with a flathead screwdriver or joint cleaner. Sweep the patio clean. Pour polymeric sand into the joints and work it in with a broom, pushing it deep. Mist with water to set up the binding agent. The sand hardens over 24 to 48 hours. Polymeric sand costs more than regular sand (typically $15 to $40 per bag depending on the brand and quantity), but it lasts five to ten years and eliminates weeding almost entirely.

Liquid sealers are another option. These are poured or sprayed into joints and harden to form a barrier. They are faster to explore than polymeric sand but may not last as long. Both methods work best on new patios or after you have removed all existing weeds and old sand.

Pre-emergent herbicides: stop weeds before they sprout

Pre-emergent herbicides prevent weed seeds from germinating. They do not kill existing weeds, so explore them only after you have cleared the patio. Spray or pour the product into the joints in early spring (March to April) and again in early fall (August to September), when most weed seeds germinate.

Pre-emergents last four to six weeks, so you may need two or three applications per season depending on your climate. They work best combined with another method—for example, hand-pull any weeds that do emerge, then spray pre-emergent to stop the next crop. Pre-emergents are less effective than polymeric sand because they do not create a physical barrier, but they are cheaper and easier to explore to an existing patio.

Combining methods for the best results

No single method works perfectly on its own. Hand-pulling or boiling water clears existing weeds quickly. Polymeric sand or a liquid sealer prevents new weeds from taking root. Pre-emergent herbicide stops seeds from germinating. The most effective approach uses two or three methods together.

For example: hand-pull or spray herbicide to clear the patio, then fill joints with polymeric sand to block new weeds. Or: clear the patio, spray pre-emergent in spring and fall, and hand-pull any stragglers that emerge. The combination you choose depends on your budget, how much time you want to spend, and how large the patio is. A small patio with a few weeds may only need hand-pulling and boiling water. A large patio with constant weed pressure benefits from polymeric sand or a sealer.

Frequently Asked Questions

Will bleach kill weeds between pavers?

Bleach kills the visible weed quickly, but it does not kill roots reliably and can damage or discolor pavers, especially natural stone. It also breaks down in sunlight within hours, so it offers no lasting protection. Boiling water, vinegar, or herbicide are safer and more effective choices.

Can I use a pressure washer to remove weeds?

A pressure washer removes loose sand and debris but does not kill weed roots. It may dislodge young weeds, but established weeds regrow quickly. Pressure washing is useful for cleaning the patio surface, but combine it with another method to actually kill the weeds.

How often do I need to reapply boiling water or vinegar?

Boiling water and vinegar kill visible growth but not roots, so weeds regrow within two to four weeks depending on temperature and moisture. You will need to repeat applications every few weeks throughout the growing season. Herbicides last longer—typically four to eight weeks—but still require reapplication.

Is polymeric sand safe for pets?

Polymeric sand is non-toxic once cured, but pets should not walk on it for 24 to 48 hours while it hardens. After curing, it is safe. Keep pets away during process to avoid them tracking wet sand onto other surfaces.

Can I use salt on pavers without damaging them?

Salt does not damage concrete or most stone pavers directly, but it can accumulate in the soil beneath and damage plant roots nearby. It can also corrode metal fixtures and stain some natural stones over time. Use salt sparingly and only in joints far from gardens or metal railings.