Does Roundup Kill Dandelions? [THE TRUTH]

Does Roundup Kill Dandelions?

Do you have dandelions in your garden? Are you tired of these infamous weeds destroying your beloved plants? If so, Roundup is indeed the perfect choice that can kill dandelions. It is an effective weed killer that inhibits the growth of various other weeds as well.

Knowing about Roundup and how it can kill dandelions can help you a lot, so find your answers here.

Does Roundup Kill Dandelions?

Yes, Roundups can kill dandelions. A perfectly safe weed killer this is easily available and can be easily used. Just a few days of application and your garden will be free from dandelions for good.

How Long Does Roundup Take To Kill Dandelions?

Roundup takes almost one to two weeks to kill weeds spread in a garden completely. Here are some points that make Roundup a great choice to kill dandelions:

  • Quite effective based on ingredients

To destroy dandelion weeds that are found in lawns, Roundup pro can be used. It consists of an active ingredient of glyphosate and is a systemic herbicide.

  • Kills weed from roots

This herbicide quickly decimates the population of such types of plants. The roundup consists of sulfentrazone, penoxsulam, dicamba, and 2,4-D, dimethylamine salts.

  • A commercial product to use

Roundup is a commercial killer that also prevents additional weed growth for 12 months. This common garden weed often needs six hours to get killed.

  • Quick in results

Other products of Roundup, such as premixed glyphosate formula, take three hours for yellowing plants and one to two weeks for complete kill. Roundup Max Control 365 also takes one to two weeks for the complete death of the weeds along with their roots.

What are the risks of having dandelions in a garden or field?

Though Dandelion is likely to be a safe weed for most people, but there are a few risks associated with them. Here are the risks of having dandelions in a field:

  • Risk to human health 

If present in the vegetable, this stubborn lawn weed can cause stomach infections and discomfort.

  • Damages desirable plants

When dandelions grow in vegetable or fruit gardens, they might affect the surrounding plants. Also, it damages the crops grown in a field.

  • Takes away nutrients from surrounding plants

Dandelions tend to be a weed that pulls water and nutrients from the other saplings. Therefore, it is highly recommended to get rid of its floating seeds.

  • Shorten productive life

Dandelion, a perennial weed, causes yield losses mostly in annual winter crops. In addition to this, it also

can shorten the productive life of forage seed crops. Dandelions can reduce even the productivity of hay crops and pastures.

What Kills Dandelions Permanently?

There are several types of herbicides and natural dandelion killers available on the market. Some of the organic ways and herbicides to get rid of dandelions are as follows:

  • Corn gluten meal

It is a herbicide that is applied before the germination of the seeds. It should be used in the area of unwanted plants as it can kill other plants in the garden as well.

  • Alcohol

The isopropyl alcohol sucks the moisture from the Dandelion weeds and eventually kills them. If the lawn is filled with dandelions, it needs to be reapplied after 3 to 6 hours.

  • Roundup 

The popular choice among gardeners is Roundup. Even when dandelions are young and growing actively on the lawn, Roundups become an easy solution. It avoids damaging the grass around this weed and targets the roots of dandelions only.

  • White Vinegar

It is one of the most effective organic wastes that does not utilize dangerous chemicals the removal of unwanted plants such as dandelions. Just a spray of undiluted vinegar can save your grass from other weeds.

So, use both chemical and natural weed killers for permanent results.

How To Stop Dandelions From Spreading In Lawns?

Roundup is one of the great solutions to stop dandelions from spreading on lawns.  It can be referred to as an original weed killer that stops when the ugly heads of the plants start rearing.  From vegetable gardens to flower gardens, Roundup is effective for all types of gardens from vegetable gardens to flower gardens.

Is Roundup Effective On Dandelions?

Yes, Roundup is an effective weed killer for dandelions. The reason why Roundup is an effective herbicide are mentioned below:

  • Roundup treats vegetable gardens

Roundup being an herbicidal product, can treat everything from vegetable gardens to undesirable plants and weedy flower beds. There are several products under the Roundup name that can kill grasses and perennial weeds.

  • The herbicide controls turfgrass

This herbicide leaves turfgrass unharmed in your gardens. It starts working just after its application and remains rainproof for about four hours.

  • Roundup can defeat dandelions quickly 

The roots of dandelions grow up to 10 to 15 feet from the ground; Roundup products defeat the problem quickly. The new effects of Roundup do not kill any green plants, unlike the old Roundup ones.

  • It can kill a wide range of weeds 

Roundup covers a broad range of weeds, including dandelions, and inhibits their regeneration and new growth.

What Will Kill Dandelions But Not Grass?

The modernized form of Roundup for lawns does not kill the surrounding grass around dandelions and other weeds. As this herbicide does not contain glyphosate, so it will not kill the turfgrass. The spray of Roundup does not influence these desirable plants of a vegetable and fruit garden.

What Is The Ingredient In Roundup That Kills Weeds?

Roundup products contain quinclorac, MCPA, sulfentrazone, and dicamba. It is a commercial weed killer that is coated on the leaves of the weeds during the bird formation stage. When Roundup for lawns is used, it controls specific weeds and not lawn grasses.

Why Is It Important To Kill Dandelions?

Dandelions disrupt the growth of other plants in a garden. The sturdy weed’s roots spread quickly in the soil affecting the desirable plants. It may be pretty hard to handle this nuisance created by unwanted plants. It may be a universal threat to grass lawns.

Will Roundup Kill Weeds Like Dandelions Quickly?

Yes, weed killer Roundup can quickly remove dandelion plants regardless of the soil conditions. Dandelions can take over the whole lawn as they move in the direction of the wind. Therefore, gardeners should start using Roundup for permanent removal. Being a rainproof chemical, Roundup quickly does its job.


Does mowing dandelions spread?

Yes, dandelions that have been mowed down may grow again. But Roundup, when used, can destroy the developing flowers before a seed of dandelion matures. It also helps in the prevention of the opportunity for new germination of its seeds.

How to control dandelions?

To control dandelions, there are various ways, such as organic and chemical-based weed killers, available on the market. The most commonly used killer is Roundup. It is because Roundup is a herbicide and a permanent solution for killing dandelions.

Is Roundup safe for lawns?

Yes, Roundup is a safe selective or nonselective weed killer with glyphosate as one of the active ingredients. It eventually can kill a weed because of its selective properties. This chemical herbicide ends up giving brown circles to dandelions.

Is it difficult to remove dandelions?

No, it is not difficult to remove dandelions completely from the garden. To avoid damage to the grass from dandelions, it’s recommended to use Roundup.

What’s the best time to kill dandelions?

The best time to kill dandelions is in late October and mid-November. It is because this is the time to develop seedlings in the weeds. So, it is better to get rid of it at a very early stage.


Dandelions are pesky weeds that need to be killed without harming the surrounding grass. Dandelions sap water and nutrients from the surrounding plants on the lawn. Therefore, weedkillers such as Roundup are applied directly to the roots of the plant. This broadleaf herbicide will help in getting rid of weeds permanently.

Owen Jung

Owen is the co-founder of Our Daily Homestead. Own grew up in his parent's homestead in Illinois and learned all things gardening, sustainability, and off-grid living while he was young. He now shares his knowledge through this website.

Recent Posts