5 Best Weed Killer of 2024 - Reviewed - Reviewed
Controlling weeds like crabgrass in and around your lawn can be tricky, and nobody wants to accidentally use the wrong product and kill parts of their grass. We're here to help; we've used nearly every type of weed killer on the market, from selective herbicides that kill tough weeds (but not your lawn!) to non-selective ones like Roundup that will kill just about any plant they touch.
There's no one weed killer that works "best" for lawns and grass, because the best weed killer for you is the one that works with the weeds you have, doesn't harm your desired plants, and is appropriate for your local ecosystem.
All types, even organic weed killers, need to be applied carefully. That means following the label to the letter, using appropriate safety gear and clothing, keeping chemicals away from kids and pets, and applying the weed killer on a day without much wind.
You also should be mindful of the active ingredient in each of the weed killers here. Most are safe for you, your pets, and your kids when you follow the label, and all the ones we're featuring are considered relatively non-toxic to bees and other animals (though they may be harmful to fish or frogs). You need to be careful about what you introduce to your environment, and a perfect lawn isn't worth damaging the ecosystem that supports it.
To help you find the right lawn weed killer, we explored a variety of options available online. Based on our research, these are the best weed killers for lawns available online right now.
A Word on Weed Prevention
What even is a weed? Do you need to get rid of it? These are important questions to consider when crafting a weed-control plan for your lawn. While having a picture-perfect lawn full of a single, uniform type of grass may appeal to some, others may be fine with a mix of grass and weed types as long as things don't get out of hand. Generally, this latter approach will yield a healthier overall garden, with better biodiversity.
Nearly every state has what's known as an "Extension School" that studies your local plant life and can give specific, regional recommendations on how to maintain your lawn and garden. They're also the best resource when it comes to local regulations, which can vary from state to state and restrict what types of weed killers are available to you.
No matter what, the best way to control lawn weed is to help feed and maintain a healthy lawn of desirable grasses that grow well in your particular climate zone. You can see the USDA's Plant Hardiness map for specifics about what zone your home is in. That'll determine the types of grass you should cultivate, the types of weeds you're likely to encounter, and how to best time your lawn care routine so that your lawn is as healthy as possible.
Even the best, healthiest lawn is likely to have some weeds that sprout. Some weeds will come and go without bothering your lawn, and flowering types can be important for local pollinators such as bees.
For other types of invasive weeds, such as crabgrass, you'll need to be both aggressive and proactive to keep them from taking over your lawn. In these cases, you'll want to use a weed preventer.
Though most of the weed killers we've used advertise the ability to "prevent weeds," in most cases you'll want to investigate a "pre-emergent" herbicide that you apply in the spring and early summer before weeds start to sprout.
This prevents weeds from germinating, so you don't have ugly weeds to begin with. It can also prevent new weed seeds from germinating, so you'll need to time your efforts so you don't interfere with your ability to re-seed thin or dead patches in your lawn later.
If all else fails, you can always just dig the weed out by removing the root system. Otherwise, weed killers like those featured above are your best bet. They're more specifically designed to kill weeds that have already begun to sprout, when pre-emergents are no longer effective.
Keep your lawn healthy, apply pre-emergent at the right time, and use weed killer sparingly to control invasive species, and your lawn will be in tip-top shape in no time.
Frequently Asked Questions About Weed Killers
When is the Best Time to Spray Weed Killer?
Spring is the best time of year to spray weed killer since weeds are still in their pre-growth phase. Plus, spring is also fairly warm and damp, and absorption is required for herbicides to work properly. In the morning, weeds grow the fastest, so it's best to spray them around then for quicker absorption.
Do Natural Weed Killers Work Well?
Natural weed killers are made of natural ingredients, such as vinegar, plant oil, soap, and different acids. They don't completely prevent weed growth, but they do work well at controlling weeds in your lawn.
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