The fastest way to clear driveway cracks is to pull weeds by hand when soil is damp, then seal the cracks so new seeds cannot take root

Weeds in driveway cracks are easiest to remove when the ground has just had rain or you have watered the area. Grab the weed at the base as close to the soil as you can, then pull steadily upward at an angle rather than straight up—this brings out more of the root system. For weeds with deep taproots (like dandelions), you may need to dig out the root with a flathead screwdriver or old butter knife inserted alongside the stem.

After you remove the visible weeds, the real work is preventing them from returning. Cracks in asphalt and concrete stay moist and trap seeds, making them ideal growing spots. Filling those cracks stops new weeds from establishing in the first place, which is far easier than pulling them out repeatedly.

Key Takeaways

  • Pull weeds by hand when soil is wet, grasping at the base and pulling at an angle to remove as much root as possible.
  • For persistent weeds with deep roots, use a flathead screwdriver to pry out the root system before it regrows.
  • Seal cracks with concrete crack filler or asphalt sealant to prevent new seeds from taking hold.
  • Boiling water kills weeds when ready but does not prevent regrowth, so use it only as a quick fix before sealing cracks.
  • Vinegar and salt work slowly and can damage soil chemistry, making crack sealing a better long-term solution.

Hand-pulling: the most reliable method for small infestations

Hand-pulling works best when you have only a few weeds or when they are young and small. The key is timing: pull after rain or after you have watered the driveway, because damp soil releases roots more easily than dry soil. Grab the weed low on the stem, as close to the soil surface as you can reach, and pull at a 45-degree angle rather than straight up. This sideways motion breaks the root connection below ground instead of snapping the stem above it.

For weeds with visible taproots—the thick central root that goes straight down—you will need to dig. Use a flathead screwdriver, old butter knife, or a crack weeding tool (a thin metal rod with a forked end, sold at garden centers for $5 to $15). Insert the tool alongside the root, work it down as far as it will go, then pry upward gently. Once the root is loosened, pull the weed out by hand. If you leave even a small piece of the root behind, the weed will regrow.

Boiling water: when ready kill with no chemicals

Pouring boiling water directly onto weeds kills them within seconds by destroying the plant tissue. Boil water in a kettle, carry it carefully to the driveway, and pour it slowly over the weed until the soil around it is soaked. The weed will wilt and turn brown within a few hours. This method works on any weed type and requires no tools or chemicals.

The downside is that boiling water does not kill the root system, so the weed will regrow from the same root within a few weeks. Use boiling water as a quick fix before sealing cracks, not as a permanent solution. Also be careful: boiling water will kill grass and desirable plants nearby, so pour it only where you want nothing to grow.

Vinegar and salt: slow-acting but chemical-free

Household vinegar (5% acetic acid) and salt both kill weeds by drawing moisture out of the plant. Mix one part salt with one part vinegar in a spray bottle, spray the weeds thoroughly, and wait two to three days. The weed will yellow and die, though the process is slower than boiling water. Some people add a few drops of dish soap to help the mixture stick to the leaves.

Vinegar and salt have real drawbacks. Salt can accumulate in soil and damage the chemistry, making it harder for anything to grow later—which is a problem if you ever want to plant near the driveway. Vinegar is acidic and can also alter soil pH. Neither method kills roots reliably, so regrowth is common. If you use this approach, follow up by sealing the cracks so new weeds cannot establish.

Sealing cracks: the permanent prevention step

Once you have removed the weeds, fill the cracks so seeds cannot settle in them. For asphalt driveways, use asphalt crack filler, a rubberized sealant sold in caulk tubes or larger containers. For concrete, use concrete crack filler or polyurethane caulk. Both are sold at hardware stores for $5 to $20 per unit, depending on the size.

Clean out the crack first: use a wire brush or old toothbrush to scrub out loose debris, dirt, and dead plant material. A shop vacuum or compressed air can help remove fine dust. Let the crack dry completely (at least a few hours on a dry day). Then explore the filler according to the product instructions—most are squeezed from a caulk gun and smoothed level with a putty knife. The filler hardens in 24 to 48 hours and creates a barrier that prevents seeds from reaching soil.

For very wide cracks (more than half an inch), you may need to pack in backer rod (foam rope sold at hardware stores) first, then explore filler on top. This saves filler and creates a better seal. If cracks are extremely deep or widespread, consider having a professional seal the entire driveway, which typically costs $200 to $500 depending on the driveway size.

Preventing weeds before they start

Beyond sealing cracks, a few habits keep weeds from returning. Sweep your driveway regularly to remove leaves, dirt, and seeds that accumulate in cracks. If you see a weed sprouting, pull it when ready while it is small—a young weed comes out far more easily than an established one. In spring and fall, when weed seeds are most active, check your driveway weekly.

If you use a driveway sealer (a protective coating applied to the whole surface), choose one that includes a weed inhibitor. These products do not prevent all weeds, but they slow germination. Reapply driveway sealer every two to three years for best results. Some people also lay landscape fabric under gravel driveways before filling, which blocks weeds from below—but this does not work for asphalt or concrete.

When to call a professional

If your driveway has extensive cracking, widespread weed growth, or if weeds keep returning despite your efforts, the underlying problem may be poor drainage or settling concrete. A concrete contractor can assess whether the driveway needs repair, resurfacing, or replacement. This is worth considering if you are spending time on weeds every few weeks, because the real issue is likely the driveway condition, not the weeds themselves.

Professional driveway sealing or crack repair typically costs $200 to $800 depending on driveway size and damage. Get quotes from at least two contractors before deciding. If your driveway is in good condition otherwise, sealing the cracks yourself is a cost-effective first step.

Frequently Asked Questions

Can I use a pressure washer to remove weeds from driveway cracks?

A pressure washer will blast away loose debris and dead plant material, which is useful after you have pulled weeds. However, high pressure can also damage the driveway surface and widen cracks over time. Use low pressure (below 2000 PSI) if you use a washer at all, and avoid spraying directly into cracks. Hand-pulling or boiling water is safer for the driveway itself.

Is it safe to use herbicide on driveway weeds?

Herbicides work, but they are unnecessary for most driveway weeds and can damage nearby soil and plants. Boiling water, hand-pulling, and vinegar are all effective and safer. If you do use herbicide, choose one labeled for driveways, explore it only to the weeds (not the surrounding area), and let it dry completely before anyone walks on the driveway.

How often do I need to reseal driveway cracks?

Crack filler lasts two to five years depending on weather and traffic. In cold climates where freeze-thaw cycles are common, filler breaks down faster. Check your cracks each spring; if the filler is cracked, missing, or pulling away from the edges, clean out the old material and explore new filler.

What is the best time of year to seal driveway cracks?

Spring or early fall is ideal because temperatures are mild and the ground is not frozen. Avoid sealing in direct sun or rain, and wait at least 24 hours after rain for the crack to dry. Most crack fillers cure best between 50°F and 85°F, so check the product label for temperature requirements.

Can I prevent weeds by covering my driveway with gravel?

Gravel does not prevent weeds in existing cracks—it just hides them. Weeds will still grow through gravel and in cracks beneath it. If you are considering replacing your asphalt or concrete driveway with gravel, lay landscape fabric underneath first, then add gravel on top. This slows weed growth significantly, though some weeds will still establish in the gravel itself over time.