Patio weeds can be frustrating—but the good news is that they’re easy to control once you understand why they grow and how to prevent them.
TL;DR – How To Stop Weeds From Growing Between Patio Pavers
- Weeds between pavers don’t grow from underneath—they grow from airborne seeds that sprout in dirt that collects in the joints.
- Keep weeds away by reducing dirt buildup, cleaning and re-sanding joints every 3–5 years, and sealing your pavers to harden the sand.
- If weeds appear, spot-treat with a safe weed killer like RoundUp for quick removal.
Why Do Weeds Keep Growing Between My Pavers?
This is one of the most common questions we hear each spring in Central Pennsylvania. Many homeowners assume weeds push up from underneath the patio, but that’s not the case.
Common Misconceptions About Patio Weeds
Weeds do not grow from underground through the pavers.
Adding extra stone, gravel, or weed barrier fabric beneath your patio will not stop weed growth on the surface. Even a perfectly installed patio can develop weeds if debris collects in the joints.
How Weeds Really Grow Between Paver Joints
Nearly all patio weeds come from airborne seeds that land on top of the patio. Over time, dust and dirt settle into the joints, creating the perfect place for seeds to germinate.
Once a thin layer of soil forms, weed growth begins.
How to Prevent Weeds Between Patio Pavers
1. Reduce Dirt Buildup
Keeping your patio clean is the first line of defense. Regular sweeping helps reduce the dirt and debris that creates a seedbed.
2. Clean and Re-Sand Every 3–5 Years
Use a pressure washer to clean the joints, then sweep in fresh sand. This restores the patio’s structure and removes organic material where weeds thrive.
3. Seal the Pavers
Applying a quality paver sealer hardens the joint sand, making it much harder for weed seeds to sprout. Sealing also revives your pavers’ color and improves the overall appearance.
4. Spot-Treat When Necessary
If weeds do appear, a quick spray with a weed killer—such as RoundUp—won’t harm the pavers and provides a fast, effective solution.
