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How to Get Rid of Weeds in Cracks Without Using Herbicide

Updated on April 23, 2014

Any landscape with hard surfaces—sidewalks, stone walls, brick borders, paved driveways, etc.—is sure to have at least a few weeds in cracks. Here a some organic solutions to the problem, some more permanent than others.

Thanks to their rapidly spreading bulbets, these violets, which will live and grow year round in mild climates, are difficult to eradicate.
Thanks to their rapidly spreading bulbets, these violets, which will live and grow year round in mild climates, are difficult to eradicate. | Source

TEMPORARY SOLUTIONS

Boiling Water

Pouring boiling water in cracks will kill weeds if their roots are shallow. After treating, simply pull or scrape the scalded plants out by hand. (You may have to apply the hot water more than once. Weeds are real survivors!)

Although boiling water won't actually kill mature weeds like dandelions, which have deep taproots, it will offer a temporary respite from them.

Flamer Weeders

Flame weeders work similarly to boiling water, killing weed growth above ground.

Flame weeders produce the best results (weed death) when used in dry conditions on small weeds. If used on larger, deeply rooted weeds, the results will be temporary, much like treating the weeds with boiling water.

High-Pressure Washers

A high-pressure washer, like the ones people use to clean their pavement and siding, is another way to remove shallow weeds effectively from cracks in sidewalks and driveways. Of course, power washing won't work on gravel, and it could blast away the hardscaping as well as the weeds if used on cracks between small stones or border pavers.

Boiling water may have to be applied multiple times in order to kills weeds in cracks.
Boiling water may have to be applied multiple times in order to kills weeds in cracks. | Source

MORE PERMANENT WEED SOLUTIONS

Removing weed roots and fleshy roots (like the bulbils on pink oxalis, a.k.a. pink shamrock) is a more permanent solution than killing the weed growth above ground. For prying roots from cracks, weeding knives and hand forks work well.

Weeding Knives

Pulling weeds with taproots from cracks is often ineffective. More often than not, the root snaps off, only to sprout again. Weeding knives, which often have thin, hooked blades, slip easily into cracks, even narrow ones, making it more likely that you'll remove the whole root.

Hand Forks

Although they're not as easy to use against weeds in narrow cracks as weeding knives, hand forks have more uses. For instance, small hand forks are must-haves for removing weeds from beds without disturbing other plants in the garden. They're also handy for prying weeds out of bigger spaces, such as the gaps between edging pavers and stones.

Wire Brushes

Regularly scrubbing hardscaping with a wire brush is an excellent way to prevent weeds in cracks. It will not only remove weed seedlings, but also weed seeds as well as the dirt and organic matter that would otherwise encourage the seeds to germinate.


DeWitt P3 3-by-250-Foot 5-Ounce Pro 5 Weed Barrier Fabric
DeWitt P3 3-by-250-Foot 5-Ounce Pro 5 Weed Barrier Fabric

A combination of landscaping fabric and gravel works well to suppress weeds between stones and pavers.

 

PREVENTING WEEDS IN CRACKS

Fabric Barriers

Placing barriers like landscaping fabric under gravel and pavers is a good way to suppress weeds —if the ground is cleared of weeds first. If the barrier is placed over weeds, some of them will simply force their way through the weaving, and they'll be even more difficult to remove.

Mulch & Gravel

A combination of cleared ground, landscaping fabric and mulch or gravel between rocks, stones and pavers is an excellent recipe for weed suppression. Gravel works better than mulch, as mulch will break down more quickly, providing a medium in which weed seeds can germinate and grow.




Source

About the Author

The Dirt Farmer has been an active gardener for over 30 years.

She first began gardening as a child alongside her grandfather on her parents' farm.

Today, The Dirt Farmer gardens at home, volunteers at community gardens and continues to learn about gardening through the MD Master Gardener program.



© 2012 Jill Spencer

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    • The Dirt Farmer profile imageAUTHOR

      Jill Spencer 

      5 years ago from United States

      Thanks W1totalk. We've had so much warm rain lately that everything's growing rapidly here--especially the weeds!

    • W1totalk profile image

      W1totalk 

      5 years ago

      These are great solutions for an attack of weeds. Good article.

    • The Dirt Farmer profile imageAUTHOR

      Jill Spencer 

      5 years ago from United States

      Very true, Barbara! In this article, though, I limited myself to toxin-free methods, so no herbicides of any sort--even organic. To anyone who does use horticultural strength vinegar: be sure to apply it carefully while wearing protection. It'll burn your skin and could damage your eyes if it splashes into them.

      Thanks for commenting, Barbara! A good suggestion for people who want to use an organic herbicide.

    • Barbara Kay profile image

      Barbara Badder 

      5 years ago from USA

      I've got one for you to add - vinegar. It works really well.

    • The Dirt Farmer profile imageAUTHOR

      Jill Spencer 

      5 years ago from United States

      Hey Derdriu. I don't blame you for leaving those weeds! As long as somebody's enjoying them, maybe they're really not weeds at all. (: Nice to hear from you! Hope you're loving this cold weather. --Jill

    • profile image

      Derdriu 

      5 years ago

      Jill, There's grass that keeps trying to move into the front walk between the two yews, and there are assorted weeds that don't want to leave a bit of the walk near the retaining wall. The hot water treatment has worked for me in other situations. But I decided not to follow through in these two locations since the box turtles, green and tree frogs, and spring peepers appear to consider them their playground!

      Respectfully, and with many thanks for all the fine explanations and pretty pictures, Derdriu

    • The Dirt Farmer profile imageAUTHOR

      Jill Spencer 

      5 years ago from United States

      Thanks, Patricia! We're snuggling up here in MD where it's in the 20s. Brrr! And snow is on the way, too. I can't wait for that! Hope you're safe and warm in FLA. Take care, Jill

    • The Dirt Farmer profile imageAUTHOR

      Jill Spencer 

      5 years ago from United States

      Thanks, Patricia! We're snuggling up here in MD where it's in the 20s. Brrr! And snow is on the way, too. I can't wait for that! Hope you're safe and warm in FLA. Take care, Jill

    • pstraubie48 profile image

      Patricia Scott 

      5 years ago from sunny Florida

      Lots of good tips here, Dirt Farmer. Those pesky little weeds are so annoying. I usually dig them out with a tool of some sort but definitely will try some of your other suggestions.

      Have a lovely rest of the 21st day of this new year.

      Sending Angels to you :) ps

    • The Dirt Farmer profile imageAUTHOR

      Jill Spencer 

      5 years ago from United States

      Hi aviannovice! Yep, weeds are always a problem. Here, we tend to weed year round! The fun never stops. (:

    • aviannovice profile image

      Deb Hirt 

      5 years ago from Stillwater, OK

      I think we all have had weed problems like this. Thanks for the great advice.

    • The Dirt Farmer profile imageAUTHOR

      Jill Spencer 

      5 years ago from United States

      Hi Glimmer Twin Fan! The boiling water trick should work well on those nasty weeds--at least temporarily. Btw, I've noticed recently that I'm actually cultivating several plants that have long been considered weeds, like morning glory, yarrow and vinca. Maybe I need to change my attitude toward chickweed. It would make gardening a lot easier! --Jill

    • Glimmer Twin Fan profile image

      Claudia Mitchell 

      5 years ago

      Another great tips hub! We always have this problem on our front walkway. Boiling water is a great suggestion that I will be trying next summer! Thanks!

    • The Dirt Farmer profile imageAUTHOR

      Jill Spencer 

      5 years ago from United States

      Hi faythef. Pulling weeds can be a pain, but oh the satisfaction when you actually root one out! Nice to hear from you. --Jill

      Hey Pearl! Hope you get that weeding knife for your birthday. It sure will make your garden work a lot easier! Take care, Jill

    • grandmapearl profile image

      Connie Smith 

      5 years ago from Southern Tier New York State

      Jill, this is good stuff to learn about. I have never used a weed knife, but I know what I will be asking for as a birthday gift! Thanks for this. Voted Up and Useful.

      Pearl

    • faythef profile image

      Faythe Payne 

      5 years ago from USA

      Thank you for the tip..I hate try to pull those buggers out of cracks...

    • The Dirt Farmer profile imageAUTHOR

      Jill Spencer 

      5 years ago from United States

      Thanks for sharing the hub, Carol! And for your kind words. Happy New Year! --Jill

    • carol7777 profile image

      carol stanley 

      5 years ago from Arizona

      As always you have solutions to perplexing problems in the garden and the plant world. Very good.. Voting up and pinning...

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