Experts Reveal How to Stop Weeds From Growing in Pea Gravel Once and for All

Pea gravel is made of smooth, small stones and is used for walkways, garden paths, patios, and more. However, because there’s often nothing between the stones and dirt, weeds can easily germinate and penetrate the gravel.

Fortunately, there are many preventative measures that can stop this from happening. Read on for expert tips and tricks that will help you keep weeds out of your pea gravel once and for all.

Install Weed Barrier Fabric

If you haven’t already laid your pea gravel, then the best method is to install a weed barrier fabric underneath it. “This will create a physical barrier for this location, preventing it from getting any sunlight,” says Angelika Zaber, a lawn care specialist and gardening expert for Online Turf.

Installing the fabric is easy—first, prepare the area by removing existing weeds, then spread soil to make a flat surface. Next, measure the area and cut the fabric to fit. Finally, install the fabric by laying it down and ensuring it overlaps the edges. Secure the edges with landscape staples before adding the pea gravel.

With this method, weeds won't have enough light for photosynthesis, leading them to become weak and, over time, die off completely. “It also stops the gravel from sinking and mixing into the soil, becoming easily displaced, and requiring you to top it up more often,” she adds.

However, landscape fabric can sometimes be a bad idea. It can restrict the natural flow of water and air to the soil, and it can be difficult to remove.

Hand Pull the Weeds

If you've already laid your pea gravel without barrier fabric, hand-pulling weeds can be effective—if not frustrating. Hand pulling is the classic removal method that doesn't involve any chemicals or cost money. However, it can be labor-intensive, and the weeds will regularly return.

“To make it easier, wait until the soil is moist, put some protective gloves on, and then pull the weeds slowly,” Zaber says. Pulling too quickly can cause the weeds to snap or leave their roots behind, so they'll come back much sooner.

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Rake the Pea Gravel

Believe it or not, you can rake pea gravel to prevent weeds from taking root. Gene Caballero, landscaping expert and co-founder of GreenPal, recommends regularly raking the surface of pea gravel to keep any young weeds from growing.

This method doesn’t require as much work as hand pulling, but there's still some labor involved: After laying the pea gravel, rake it weekly to keep it fresh and prevent weeds from appearing.

For the best results, turn the pea gravel by raking at different heights, as this helps break up any weed roots before they reach maturity. Also, be sure to add more pea gravel if necessary. “Always keep the gravel at least 2 to 3 inches deep so that the seeds can’t take hold,” he says.  

Create an Organic Weed Killer

For DIY methods, you can make your own weed killer spray. Simply mix water and salt in a 3-to-1 ratio and put it into a spray bottle. Then, apply it to the weed foliage. “Alternatively, when used in an area where soil health is not a concern, such as a driveway, you can switch to a 2-to-1 salt and water ratio,” says Zaber. Salt can dehydrate weeds, so once absorbed, they’ll wilt, turn brown, and eventually die. This method is natural and organic, and doesn’t rely on harsh chemicals. However, don't use your spray near other plants you want to keep, as the salt can negatively impact them.