Though it’s quite common for different types of weed to grow around your lawn throughout the year, crabgrass can be one of the most frustrating occurrences. It’s unsightly, tricky to get rid of, and can spread like wildfire.

Crabgrass is what’s known as a finger-grass, which is a type of grass with creeping stems that is able to sprout in one spot and then quickly extend itself throughout a healthy lawn or walkway.

 If you’ve had just about enough of this pesky garden pest, now is the perfect time to purchase a specifically formulated weedkiller designed to eliminate it! 

However, finding the very best crabgrass killer for you can sometimes be just as tricky as getting rid of the weed itself.

In this article, you’ll find five of the best performing crabgrass killers available to purchase today that have been carefully selected for their strength, quality, and ease-of-usability.

When you’ve read through the reviews, you’ll then find a helpful buyer’s guide section where you’ll be able to check out some of our top tips for when you’re ready to begin treating crabgrass.

Best Crabgrass Killer Buying Guide

Before you take to your lawn with one of the crabgrass killers we’ve mentioned above, make sure that you’re clued up with a little help from the following information.

Not only will it help you to gain a better understanding of which products are going to perform best for you, but it will also help you to learn how to treat your lawn without damaging it:

How to correctly identify crabgrass

Step number one to ridding your lawn of pesky crabgrass is to properly identify it from other kinds of weeds (sometimes upon first glance, crabgrass can even resemble types of grass). 

However, just like its name suggests, crabgrass is tough and has many legs – just like a crab you would find at the beach! Here are the two different types of crabgrass you might discover growing in your garden:

  1. Hairy crabgrass
  2. Smooth crabgrass

The hairy type of crabgrass is so-called because, if you get up close to its leaves and stems, you will discover little hairs growing all over the plant. On the other hand, despite its name, smooth crabgrass does also feature hair, except these little hairs, are only present at the plant’s auricles, which are the small, ear-like projections on the inner side of the plant, right at the bottom of the leaves.

Regardless of this, both types of crabgrass have a spade-like tip that grows at a horizontal angle from the ground, which is one of the most telltale signs when trying to identify crabgrass.

Furthermore, if crabgrass has been left to grow for quite some time, the stems will be a lot easier to see (the stems will also meet at the tip of the roots, right where the undergrowth starts). Since this type of weed hardly ever points in the same direction as common grass, this makes them pretty easy to spot on your lawn.

How to treat your lawn without damaging it

Weedkiller has always had a reputation for being full if harsh chemicals that can destroy parts of your lawn that you want to say healthy and intact. Though many formulas are mixed with ingredients that have been designed to kill anything that it comes in contact with, there are some types of weedkiller that rely on less extreme killing methods.

For that reason, the best weedkiller will eat away the crabgrass while keeping all of your seasonal growth and lawn grass intact. 

Top Tip: if you’re not going to be treating any other weeds besides crabgrass, sticking to a weedkiller that’s solely made to treat crabgrass is going to be your best choice. However, if you are going to be treating other types of weeds at the same time, a multi-killer plant killer shouldn’t be completely ruled out. 

The best time to use crabgrass killers

Grass tends to be split into three groups. These are annual, bi-annual, and yearly. Out of these three types of grasses, the grass that you would last to remain healthy and alive throughout the entire year is known as ‘perennial’ while the other types of grass contain the grass that you would like to kill off.

Although you can most certainly use any of the products we have mentioned above throughout the year, treating crabgrass before the ground temperature begins to rise above 55 degrees Fahrenheit is highly recommended because it is better able to prevent weed growth from occurring later on in the year.

When it comes to selecting the best time to treat crabgrass with a weedkiller, the key is to make sure that the weedkiller you select will allow the perennial grass to continue flourishing without damaging it during your weeding treatment process.

For this reason, we recommend using crabgrass weed killers when you spot them growing right before spring begins as April and May are some of the best times to spray crabgrass you’d like to get rid of. 

Best Crabgrass Killer – FAQ’s

Can crabgrass killers be used in wet weather?

This really all comes down to the quality of weedkiller you are planning on buying. If you go for a low-quality weed killer, you’ll likely find that the rainwater will wash away the solution, making it useless. In the event that this happens, you may also find that surrounding areas that you’d like to remain healthy and alive may become damaged. 

To avoid this problem from occurring, many weed killers have been created to ‘stick’ to whatever it touches, which means that you won’t have to worry about chemicals running off the crabgrass. 

However, we recommend avoiding using a weedkiller on your crabgrass right before or during the rain. It’s definitely better to just wait it out and let the weather dry up.

Additionally, weedkiller performs best in colder weather conditions, so it may be worth planning to get started on treating crabgrass before the warmer months arrive.

How can you tell that a crabgrass killer is working?

The process of treating crabgrass can often feel like a waiting game. However, though there is a varied length of time before you begin to see results (this is most dependant on the type of crabgrass killer you are using) it is most common to start to see a change after around 24-hours to 2 weeks. However, some can take even longer and results may not be seen for up to a month after spraying.

If you begin to see little patches of violet spots begin to appear on the stems of crabgrass, then you can have confidence that the product is doing exactly what it should be doing.

Additionally, during the treatment process, some people like to frequently spray the crabgrass more than once a day to speed up the process.