Dandelions can be killed by several methods, both chemical and natural: Chemical Herbicides:

• Selective herbicides such as 2,4-D and triclopyr effectively kill dandelions in lawns without harming grass

• Non-selective herbicides like glyphosate kill dandelions but also damage grass and other plants, so they should be used carefully in garden areas

• Commercial horticultural vinegar with 20% acetic acid can kill dandelions, unlike regular household vinegar which is too weak

• Three-way herbicide products containing multiple active ingredients are effective at killing dandelions and their roots

• Weed-and-feed products can help kill dandelions and strengthen lawns to prevent future weeds

Natural and Mechanical Methods:

• Digging or forking out dandelions, aiming to remove the entire taproot, is effective but requires thoroughness since dandelions can regrow from root fragments

• Mulching with organic matter or using landscape fabric blocks light and prevents dandelion growth

• Deadheading flowers before they seed stops spread

• Flame weeding or radiant heat devices kill the plant by destroying leaf cells, halting photosynthesis, but may require repeated applications

• Maintaining a healthy, dense lawn by mowing higher and fertilizing can crowd out dandelions

Early spring and late fall are the best times to apply herbicides, as combined with cold stress, this can significantly weaken or kill dandelions

. In summary, dandelions are best controlled by killing the entire taproot using selective herbicides like 2,4-D or triclopyr, or by mechanical removal combined with mulching and lawn care. Organic options include horticultural vinegar and botanically based oils, but these may require repeated applications and do not prevent seed spread