What should I put under the deck to prevent weeds?

• <div><p>Landscape fabric and a few inches of gravel should be enough to put under a deck to prevent weeds from flourishing. If you don’t want to invest the time and money on a project like this, you can regularly spray the area underneath your deck to kill weeds.</p></div>

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Last update on April 18, 2026

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Weed Services questions, answered by experts

The best time to fight crabgrass with pre-emergent herbicide is when forsythias tend to bloom. In the mid-Atlantic region, this is usually between April and May. Even if you're late to apply the herbicide, it’s effective as long as the crabgrass plant has fewer than five leaves.

Noxious weeds can be poisonous or act as an irritant to humans, but not all are directly harmful. However, indirectly, noxious weeds also compete with native species, effectively affecting our local ecosystems of plants, pollinators, and other animals.

Typically seasonally, but tailored schedules depend on local conditions and plant types.

Landscape fabric and a few inches of gravel should be enough to put under a deck to prevent weeds from flourishing. If you don’t want to invest the time and money on a project like this, you can regularly spray the area underneath your deck to kill weeds.

Whether a one-time spray treatment to control mosquitoes is enough depends on multiple factors. Often, you’ll notice a big difference after one application. However, mosquitoes are likely to return if you don't reduce attractive standing water habitats. This usually takes four to eight weeks if it’s still prime mosquito season.

The Foster City, CA homeowners’ guide to weed maintenance services

From average costs to expert advice, get all the answers you need to get your job done.

See all articles

Haley Nothstein
•
Aug 4, 2026Aug 4, 2026
How Much Does Weed Removal Service Cost? [2026 Cost]
Expect your weed removal service cost to depend on the size of your yard, the type of treatment, and the severity of the infestation.
Angi
•
May 21, 2026May 21, 2026
How to Hire Weed Removal Services for a Healthier Lawn
Learn how to find and hire qualified weed removal services for your lawn. Get expert tips on questions to ask, credentials to check, and more.
Becca Lewis
•
Jul 10, 2026Jul 10, 2026
Who Do I Hire to Pull Weeds?
Here’s who you should hire to pull your weeds to keep your yard looking tidy and your curb appeal up. Learn more in this helpful guide.
Rachel Hoffman
•
Jul 9, 2026Jul 9, 2026
When Is the Best Time to Pull Weeds?
Pulling weeds can help keep them from taking over your garden or yard. Learn the best time to pull weeds to keep your outdoor spaces beautiful and healthy.
Lawrence Bonk
•
Jul 9, 2026Jul 9, 2026
How to Make Homemade Grass and Weed Killers
There are some serious benefits to choosing a homemade grass and weed killer over store-bought products. Here are some useful DIY formulations.
Elisa Greenberg
•
Jul 10, 2026Jul 10, 2026
Spring Lawn Care: 15 Easy Steps to a Beautiful Yard
Spring is the perfect time to ensure your outdoor space shines all season long. Follow our spring lawn care DIY to get the nicest yard you’ve ever had.