How to stop weeds from growing in summer driveway cracks

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Introduction

Few things ruin the look of a driveway faster than weeds sprouting through cracks in summer. Whether your driveway is asphalt, concrete, or pavers, warm weather creates the perfect conditions for weeds to thrive. If left unchecked, they don’t just look bad—they can widen cracks, weaken the surface, and shorten the lifespan of your driveway.

Tired of pulling weeds out of driveway cracks only for them to come back stronger? This step-by-step guide will show you how to stop weeds from growing in summer driveway cracks and keep your driveway clean, durable, and attractive.

Why Stopping Weeds Matters for Your Driveway

Weeds are more than a cosmetic issue. Their roots dig into tiny cracks, trapping moisture and dirt. Over time, this pressure causes cracks to spread, leading to bigger problems like potholes or crumbling edges.

Here are the main reasons to control weeds early:

  • Protects your driveway surface: Prevents cracks from spreading and reduces repair costs.
  • Boosts curb appeal: A clean, weed-free driveway improves your home’s appearance.
  • Improves safety: Eliminates tripping hazards from uneven surfaces caused by weed growth.
  • Reduces future work: Tackling weeds now means less work in future seasons.

Just like sealing and resurfacing adds years to your driveway, proper weed control protects your investment from unnecessary damage.

Step-by-Step Guide to Stopping Weeds in Driveway Cracks

1. Remove Existing Weeds

Before preventing weeds, you must deal with the ones already growing.

  • Manual removal: Use a crack weeder tool or screwdriver to pull weeds out by the root.
  • Burning method: A propane weed torch can kill weeds without chemicals (use cautiously).
  • Natural solutions: Pour boiling water directly into cracks to kill roots instantly.

Pro Tip: Avoid just trimming weeds at the surface—roots left behind will quickly regrow.

2. Clean Out the Cracks

Weeds grow best in dirt and debris trapped in cracks.

  • Use a wire brush or power washer to clean the cracks thoroughly.
  • Remove all soil, seeds, and organic material.
  • Let the cracks dry completely before moving on.

Safety Note: Always wear protective glasses when using high-pressure water to avoid debris spray.

3. Apply a Weed Killer

Once the cracks are cleared, apply a treatment to kill roots and prevent regrowth.

  • Chemical options: Glyphosate-based herbicides are highly effective but should be used carefully.
  • Natural options: Vinegar mixed with a little dish soap works as an eco-friendly solution.
  • Saltwater spray: Salt can dehydrate weeds, though use sparingly to avoid damaging surrounding soil.

Tip: Apply weed killers on a sunny, dry day so they soak in properly.

4. Fill and Seal the Cracks

Eliminating the environment where weeds grow is the best prevention.

  • Fill cracks with asphalt crack filler or concrete caulk depending on your driveway type.
  • Smooth the filler with a trowel to create a tight seal.
  • Allow time for curing before using the driveway.

For paver driveways:

  • Sweep polymeric sand into the joints.
  • Mist with water to harden it into a weed-resistant seal.

5. Apply a Driveway Sealer

After filling cracks, add an extra layer of protection.

  • Asphalt driveways: Use a liquid asphalt sealer every 2–3 years.
  • Concrete driveways: Apply a penetrating sealer to block water and weed growth.
  • Paver driveways: Use a joint stabilizing sealer to lock sand in place.

This prevents new cracks from forming and keeps seeds from settling in.

6. Improve Drainage Around the Driveway

Poor drainage contributes to weed growth.

  • Clear gutters and downspouts so water doesn’t pool on the driveway.
  • Re-grade soil around edges so water flows away.
  • Install edging to prevent dirt from washing into cracks.

Good drainage reduces the moisture weeds need to grow.

Common Mistakes to Avoid

  1. Pulling weeds without removing roots: Leaves roots intact to regrow.
    Solution: Always dig deep or use boiling water/herbicides.
  2. Skipping crack cleaning before sealing: Dirt prevents filler from bonding.
    Solution: Pressure wash and dry cracks first.
  3. Using only surface sprays: These kill weeds temporarily but don’t prevent regrowth.
    Solution: Seal cracks after spraying.
  4. Overusing salt: While salt kills weeds, too much can damage concrete and nearby plants.
    Solution: Use salt sparingly or switch to vinegar solutions.
  5. Ignoring small cracks: Weeds make them larger each season.
    Solution: Fill cracks immediately to prevent expansion.

Extra Driveway Tips & Hacks

  • Routine maintenance: Sweep your driveway weekly in summer to remove dirt and seeds.
  • Edge trimming: Keep grass edges trimmed so roots don’t creep into cracks.
  • Preventative spraying: Use a pre-emergent herbicide in late spring to stop weeds before they sprout.

Want to learn more? Check out our guide on how to maintain a weed-free paver driveway for additional summer maintenance tips.

Conclusion

Summer is prime time for weeds, but they don’t have to take over your driveway. By removing existing weeds, cleaning cracks, applying weed killers, sealing the surface, and maintaining drainage, you’ll stop weeds from growing in summer driveway cracks for good.

With just a few hours of effort, you’ll enjoy a smooth, attractive driveway all season long—and avoid costly repairs down the road. Bookmark this guide and make it part of your summer home maintenance routine.