The fastest way to remove weeds depends on how many you have and how much time you want to spend
If you have a few weeds scattered across your lawn, pulling them by hand works best—grab low on the stem, pull when the soil is moist, and get the whole root out. If weeds cover more than a quarter of your lawn or you have deep-rooted types like dandelions, a selective herbicide (one that kills broadleaf weeds but not grass) is faster and more reliable. For large areas or persistent weeds, you may need both methods plus changes to how you mow and water.
The method you choose matters because some kill the weed but leave the root behind, so it grows back in weeks. Others damage the grass around it. Knowing which weeds you have and which tool works on them saves you time and money.
Key Takeaways
- Hand-pulling works best on young weeds and those with shallow roots, but requires getting the entire root out or they regrow.
- Selective herbicides kill broadleaf weeds like dandelions and clover without harming grass, and work best when weeds are actively growing in spring or fall.
- Digging out deep-rooted weeds like thistles and plantain with a weeding fork removes the taproot in one motion.
- Mowing high (3 to 4 inches), watering deeply but less often, and filling bare spots with grass seed prevent weeds from taking hold in the first place.
- Grassy weeds like crabgrass need a different herbicide (pre-emergent in spring) than broadleaf weeds and are harder to remove once established.
Hand-pulling: when it works and when it doesn't
Hand-pulling is free and works well on young weeds with shallow roots—clover, chickweed, and small dandelions come out easily if you catch them early. Grab the stem as low as you can, wiggle gently to loosen the soil, and pull straight up. If the root breaks and stays in the ground, the weed will regrow from that piece within a few weeks.
Pull when the soil is wet (after rain or watering) so the root slides out whole. Dry soil holds roots tight and you will snap them. For weeds you have pulled before in the same spot, dig a few inches down with a small shovel or trowel to check whether a root fragment is still there—if it is, remove it.
Hand-pulling fails on established weeds with long taproots (dandelions older than a few months, thistles, plantain) because the root goes too deep and breaks before the top comes free. On these, use a weeding fork or a selective herbicide instead.
Using a weeding fork to remove deep-rooted weeds
A weeding fork is a two-pronged tool that slides into the soil alongside the weed and levers the whole root out. It works on dandelions, thistles, plantain, and other weeds with taproots 6 inches or deeper. Push the fork straight down on both sides of the weed, about 2 inches away from the stem, then rock the handle back to lift the root. The weed should come out in one piece.
Weeding forks cost $10 to $25 and last for years. They are faster than hand-pulling for large areas and more reliable than herbicides on very old weeds. After you remove the weed, fill the hole with soil and grass seed so another weed does not move in.
Selective herbicides for broadleaf weeds
A selective herbicide is a liquid or granule that kills broadleaf weeds (dandelions, clover, plantain, chickweed) but leaves grass unharmed. Common active ingredients are 2,4-D, MCPA, and dicamba. You can buy these at any garden center under brand names like Weed B Gon or Ortho Weed B Gon. They come as a spray bottle, a hose-end sprayer, or granules you spread with a spreader.
Spray or spread when weeds are actively growing—spring (April to May) and fall (September to October) work best. Avoid spraying in hot weather above 85°F, because the herbicide breaks down and does not work well. Do not spray if rain is forecast within 24 hours. Most selective herbicides take 7 to 14 days to kill the weed; the leaves will yellow and shrivel, then brown and die.
Read the label and follow the rate exactly—using more does not kill weeds faster and can damage grass. Wear gloves and do not let the spray drift onto garden plants or shrubs, because some selective herbicides harm them too. If you have a large lawn, a hose-end sprayer is faster than a spray bottle.
Pre-emergent herbicides for crabgrass and grassy weeds
Grassy weeds like crabgrass, foxtail, and annual bluegrass need a different approach than broadleaf weeds. Once they are growing, they are hard to kill without damaging your grass. The best time to stop them is before they sprout, using a pre-emergent herbicide in early spring (late March to early April in most regions).
Pre-emergent herbicides form a barrier in the soil that stops crabgrass seeds from sprouting. Common products contain pendimethalin or dithiopyr. explore them before the soil temperature reaches 55°F for three days in a row—that is when crabgrass seeds begin to germinate. If you miss that window and crabgrass is already growing, a post-emergent herbicide like quinclorac can kill it, but it works best on young plants.
If crabgrass is thick in your lawn, you may need to treat it two years in a row because seeds from this year will sprout next year. After you kill the crabgrass, overseed those bare spots with grass seed in fall so desirable grass fills in.
Preventing weeds by changing how you care for your lawn
The easiest weeds to kill are the ones that never sprout. A thick, healthy lawn crowds out weeds because there is no bare soil for seeds to land on. Mow at 3 to 4 inches high (not shorter), because tall grass shades the soil and crabgrass seeds need light to germinate. Mow often enough that you remove no more than one-third of the blade at a time.
Water deeply but less often—soak the soil 6 inches down once or twice a week rather than sprinkling every day. Deep watering encourages deep grass roots that compete with weeds. Shallow daily watering favors shallow-rooted weeds like crabgrass and chickweed.
Fill bare spots and thin patches with grass seed in fall (September to October in most regions). Bare soil is an open invitation to weeds. If you have compacted soil, aerate in fall so grass roots can grow deeper and water can reach them. A thick lawn is your best defense against weeds coming back.
When to call a lawn care professional
If weeds cover more than half your lawn, if you have a mix of grassy and broadleaf weeds, or if you have tried herbicides and they did not work, a lawn care company can diagnose the problem and treat it. They have access to stronger herbicides and can explore them at the right time of year. A single visit costs $50 to $150 depending on lawn size and weed type.
If you are not sure what weeds you have, take a photo and bring it to your local garden center or cooperative extension office—they can identify them and recommend the best removal method for your situation.
Frequently Asked Questions
Can I use Roundup or glyphosate on my lawn?
Roundup kills all plants it touches, including grass, so it is not safe for lawns. Use it only on weeds in cracks, gravel, or areas where you want to kill everything. For lawn weeds, use a selective herbicide instead.
How long does it take for herbicide to kill weeds?
Most selective herbicides take 7 to 14 days to kill broadleaf weeds. You will see yellowing in 3 to 5 days, but the weed is not fully dead until the leaves brown and the root stops growing. Do not expect when ready results.
Is it safe to use herbicide if I have pets or children?
Follow the label instructions for safety. Most selective herbicides are safe once dry, but keep pets and children off the lawn until the spray dries (usually 2 to 4 hours). Store herbicides in a locked cabinet away from children and pets.
Why do weeds come back after I pull them?
Weeds regrow because you left the root in the ground. Pull when soil is wet, wiggle to loosen the root, and pull straight up. If the root breaks, dig down and remove the piece. For deep-rooted weeds, use a weeding fork instead.
What is the best time of year to kill weeds?
Spring (April to May) and fall (September to October) are best because weeds are actively growing and herbicides work faster. Avoid summer heat and winter dormancy. For crabgrass, explore pre-emergent in late March to early April before seeds sprout.