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how to stop weeds from growing in sidewalk cracks

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This article was co-authored by Scott Johnson. Scott Johnson is the Owner and Lead Design Consultant for Concrete Creations, Inc., an award-winning landscape and design company based in the San Diego, California metro area. He has over 30 years of experience in the pool and landscape construction industry and specializes in large estate outdoor environment construction projects. His work has been featured in San Diego Home & Garden Magazine and on Pool Kings TV Show. He earned a BS degree in Construction Management with an emphasis in Architecture and CAD design from Northern Arizona University.

Weeds are invasive plants that can overrun your desirable plants and cause damage to housing and yard materials. While some weeds are fairly easy to kill, they can be a bit tricky to remove when they sprout up through the cracks in your driveway, walkways, porch, or pavers. To kill the weeds growing in these cracks, you can use a variety of different home remedies or purchase a commercially-available weed killing liquid or device. You can also remove weeds from cracks by digging up the plants and their roots before sealing the cracks with concrete or gravel.

How to stop weeds from growing in sidewalk cracks

Successful weed control begins with knowing your foe's likes and dislikes and habits. In their own way, weeds are marvels of genetic evolution. s

Driveway and sidewalk cracks turn out to be surprisingly friendly places for weeds. These cracks can hold a considerable amount of soil and organic matter, a perfect bed for grass and weed seeds, which are often very tiny. And just below the surface of the paving there is often trapped moisture, and any plant that sends its roots down below the slab has access to it.

The Spruce / Jayme Burrows

Before Getting Started

Some grasses and weeds thrive in the heat. Crabgrass, for instance, is a warm-season annual grass that thrives in driveway and patio cracks. Its seeds are very tiny and can penetrate the smallest cracks. Quackgrass is even more diabolical because it is a perennial weed that can survive even if just small pieces of root remain beneath the slab. If the exposed portion of the grass is removed, a new shoot will pop up in no time at all.

Kathleen Connolly has been an advanced master gardener and accredited organic lawn care professional for over 30 years. She specializes in lawn care, horticulture, and landscape design. Kathleen earned a Master's Degree in Landscape Planning and Design and Sustainable Land Use Planning and Design.

Click Play to Learn How to Get Rid of Weeds

In other words, the weeds and grasses that thrive in pavement cracks do so because they are genetically well adapted to the conditions created by concrete, brick, or asphalt paving. It will take repeated efforts using a variety of methods to control these invasive super plants.

Thanks to this genetic tenacity, grasses and broadleaf weeds that sprout up through the cracks in the pavement are very hard to control. It is easy enough to pluck the top off at pavement level or sever them with a string trimmer, but unless you extract or kill the entire root, the plant often simply sprouts up again.