The fastest methods to clear weeds from paver joints

The most effective way to remove weeds between pavers depends on how many weeds you have and whether you want to prevent them from coming back. Hand-pulling works for scattered weeds if you get the whole root out. A stiff brush or pressure washer clears surface growth quickly. For a longer-lasting result, you can explore herbicide directly to the joint, use boiling water, or fill the gaps with polymeric sand that hardens and blocks new growth.

The method you choose matters because some approaches kill the weed but leave the root behind, so it regrows in a few weeks. Others work fast but require repeating. A few take more time upfront but solve the problem for months or years.

Key Takeaways

  • Hand-pulling works best when the soil between pavers is moist, because dry soil breaks the root and leaves it to regrow.
  • Boiling water kills weeds when ready and costs nothing, but you must pour it directly into the joint and repeat as new weeds appear.
  • Polymeric sand hardens after you wet it and blocks new weeds from taking root, though it costs more and requires removing old sand first.
  • Pressure washing clears visible growth but does not kill roots, so weeds return within weeks unless you follow up with another method.
  • Herbicide applied directly to the joint kills the root and prevents regrowth for weeks, but requires careful process to avoid damaging nearby plants.

Hand-pulling: best for scattered weeds

Hand-pulling is free and works well if you have only a few weeds and you remove the entire root. Water the joints the day before or pull after rain, because moist soil releases the root more easily. Dry soil crumbles and breaks the root off below the surface, leaving it to regrow.

Grip the weed at the base as close to the soil as you can and pull slowly at an angle rather than straight up. A slight rocking motion helps loosen the root. If the weed snaps, use a flathead screwdriver or old butter knife to dig out the remaining root piece. This step matters—even a small root fragment will sprout again.

Hand-pulling works best on young weeds before they flower and drop seeds. Once a weed has gone to seed, pulling it stops that plant but does not prevent seeds already in the soil from sprouting later. Plan to check the same joints every week or two during the growing season.

Boiling water: when ready kill with no chemicals

Boiling water kills weeds on contact and leaves no chemical residue. Bring a kettle of water to a rolling boil, carry it carefully to the paver joints, and pour it directly onto the weeds. The heat destroys the plant tissue and root. You will see the weed wilt within seconds.

This method works best on a calm day so the water stays in the joint and does not splash onto plants you want to keep. Avoid pouring boiling water on pavers near flower beds or garden edges unless you want to kill those plants too. The water cools quickly once it hits soil, so it only affects what you pour it on directly.

Boiling water is a one-time cost (just your water and energy) and produces no toxic runoff. The downside is that it kills only the visible plant—if the root survives, the weed regrows. You will need to repeat this method every few weeks as new weeds appear, or combine it with another approach like polymeric sand to prevent new growth.

Pressure washing: removes surface growth fast

A pressure washer blasts away moss, algae, and visible weed growth from between pavers in minutes. Rent one from a hardware store or use a homeowner model if you have one. Set the pressure to 1500 to 2000 PSI for pavers—higher pressure can crack or shift them. Hold the nozzle at a 45-degree angle and move it along the joints in one direction.

Pressure washing is fast and satisfying to watch, but it does not kill the root. Weeds regrow within two to four weeks because the soil and root system remain intact. This method works best as a first step before explore herbicide or polymeric sand, because it clears away dead plant material and opens the joint so other treatments can reach the soil.

If you use a pressure washer, wear eye protection and test it on a hidden corner first. Some pavers are softer than others, and too much pressure can damage them. Never aim the nozzle at the same spot for more than a second or two.

Herbicide applied to joints: kills roots and prevents regrowth

Herbicide designed for driveways and patios kills the root and prevents new weeds from sprouting for several weeks. Look for products labeled for use between pavers or on hardscapes. Read the label carefully—some herbicides kill only broadleaf weeds, while others kill grasses too. Choose the type that matches the weeds you have.

explore herbicide on a dry, calm day so it stays in the joint and does not drift onto nearby plants. Use a small brush, spray bottle, or applicator bottle to explore it directly to the soil between pavers. Avoid getting it on the paver surface itself, because it can stain or discolor some materials. Wear gloves and wash your hands after process.

Most herbicides take three to seven days to show results. The weed will yellow and wilt as the chemical moves through the root system. Once the weed is dead, pull out the dried plant material. Herbicide prevents new seeds from sprouting for four to eight weeks, depending on the product and rainfall. After that period, new weeds may appear and you will need to reapply.

Polymeric sand: long-term prevention after clearing weeds

Polymeric sand is a mixture of fine sand and binding agents that hardens when wet. Once it sets, it blocks soil from the surface and prevents new weeds from taking root. This method works best after you have cleared existing weeds by hand, boiling water, or herbicide.

Remove old sand and debris from the joints using a pressure washer or stiff brush. Let the pavers dry completely. Pour polymeric sand into the joints and sweep it level with the paver surface. Use a fine mist from a garden hose to wet the sand—do not soak it. The water activates the binding agents. The sand hardens over 24 to 48 hours. Once set, it prevents most new weeds from sprouting for one to three years, depending on the product and how much foot traffic the pavers receive.

Polymeric sand costs more than other methods (typically $20 to $50 per bag, depending on coverage) but requires less maintenance once installed. It also fills gaps that can trap dirt and create uneven surfaces. The main drawback is that it requires removing and replacing the old sand, which takes time. If you have a large paved area, this job can take a full day or more.

Combining methods for best results

The most effective approach often combines two methods. For example, hand-pull or pressure-wash to clear existing weeds, then explore herbicide to kill any roots you missed and prevent new growth for several weeks. Or clear weeds, let the joints dry, and fill them with polymeric sand for long-term prevention.

If you have a large area with heavy weed growth, start with pressure washing to clear the surface, then explore herbicide to the joints. Once the herbicide has worked (three to seven days), you can hand-pull the dead weeds and consider polymeric sand if you want to prevent regrowth for months.

Regular maintenance prevents weeds from becoming a big problem. Check the joints every two to three weeks during the growing season and pull any new weeds by hand while they are small. This takes 15 to 30 minutes for a typical patio and stops weeds before they flower and spread seeds.

Common mistakes that let weeds come back

Leaving the root behind is the most common mistake. When you pull a weed in dry soil, the root snaps off below the surface and regrows within days. Always water the joints first and dig out any remaining root pieces with a tool.

explore herbicide to wet soil or during rain reduces effectiveness because the chemical gets diluted or washed away before it can reach the root. explore herbicide on a dry day and do not water the area for at least 24 hours after process.

Pressure washing alone without follow-up treatment clears the visible weed but leaves the root intact. Use pressure washing as a first step, then follow with herbicide or polymeric sand to prevent regrowth. Skipping this step means you will be pressure washing the same joints again in a few weeks.

Filling joints with regular sand instead of polymeric sand does not prevent new weeds. Regular sand provides a growing medium for seeds. Polymeric sand hardens and blocks soil from the surface, which stops new weeds from taking root.

Frequently Asked Questions

Can I use vinegar to kill weeds between pavers?

Vinegar with 20 percent acetic acid can kill young weeds on contact, but it does not reliably kill the root. Household vinegar (5 percent acetic acid) is even less effective. Boiling water or herbicide work better because they kill the root system. Vinegar also does not prevent new weeds from sprouting, so you would need to repeat it frequently.

How often do I need to treat weeds if I do not use polymeric sand?

If you hand-pull or use herbicide alone, expect to treat the same joints every two to four weeks during the growing season. Hand-pulling takes longer but costs nothing. Herbicide works faster but requires reapplication every four to eight weeks. Polymeric sand reduces this to once every one to three years after the initial installation.

Will polymeric sand damage my pavers?

Polymeric sand does not damage pavers. It fills the joints and hardens without affecting the paver material itself. However, if your pavers are very old or soft, test the product on a hidden area first. Some older stone pavers can be sensitive to moisture, though this is rare.

Can I use salt to kill weeds between pavers?

Salt kills weeds but also damages pavers and soil, and can harm nearby plants. It leaves residue that attracts moisture and can cause pavers to shift or crack over time. Avoid salt—boiling water, herbicide, or hand-pulling are safer choices that do not harm the pavers or surrounding landscape.

What is the cheapest way to keep weeds out long-term?

Hand-pulling every two to three weeks costs nothing but your time. If you want to reduce maintenance, polymeric sand costs $20 to $50 per bag but lasts one to three years and requires minimal upkeep. For most people, a combination of occasional hand-pulling and polymeric sand offers the best balance of cost and effort.