Crabgrass Killer

Pre Emergents
Pre Emergents
Post Emergents
Post Emergents

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Tenacity Herbicide
4.5 out of 5 stars (89)
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A professional systemic selective pre-emergent and post-emergence herbicide that controls broad-leaf weeds and grasses in cool & warm-season turf.

Hi-Yield Weed and Grass Stopper with Dimension Herbicide
4.5 out of 5 stars (32)
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A selective pre-emergent herbicide that controls Crabgrass and other annual grass and broad-leaf weeds in lawns and ornaments landscapes.

Bayer Advanced Crabgrass Killer for Lawns RTS
2.5 out of 5 stars (2)
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A post-emergent herbicide that kills crabgrass to the root and other listed grass weeds for Kentucky Bluegrass, Perennial Ryegrass, Fescue lawns.

Esplanade EZ
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A professional non-selective pre-emergent and post-emergent herbicide that kills grasses and broad-leaf weeds far longer then the competition.

Dithiopyr 40 WSB
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Dithiopyr 40 WSB is a specialty herbicide that controls a wide variety of grassy and broadleaf weeds.


Crabgrass is an annual summer weed that seems to eventually crop up in almost any lawn. Crabgrass can be controlled with crabgrass killer products and cultural methods, but often you will need a product to give you a boost to your weed-fighting efforts. We have a huge selection of herbicides and weed killers, so you can choose the best one to tackle crabgrass in your lawn and garden.

About Crabgrass Killer

Crabgrass can be controlled before and after it emerges from seeds underground, using products called crabgrass pre-emergent and crabgrass post-emergent herbicides. They both work in different ways with different active ingredients, and your best bet for the most thorough control is to use them both. It is important to realize that a few crabgrass weeds here and there isn’t the end of the world, and that total control is very difficult. Here is some information on both types, which will let you choose the best type for your yard. Take a look at our lawn care schedule to know when to apply these products.

  • Pre-Emergent Crabgrass Herbicides: These products are a great choice because they will prevent any crabgrass from emerging above the ground, killing them before they become an unsightly problem. The key with post emergent herbicides is all about timing. They must be applied before the crabgrass seeds germinate, in early spring. There is less of a risk in misusing a pre-emergent crabgrass herbicide, and less of a chance of damaging or killing existing grass.
  • Post-Emergent Crabgrass Herbicides: Post-emergent crabgrass killers are what most of us are more familiar with. Applied to existing crabgrass in your yard, these products will kill young crabgrass weeds, but are less effective on older, larger, more established weeds. They are widely available and proven to be effective, but there are more variables to success.

How To Get Rid Of Crabgrass

*See our article How to Get Rid of Crabgrass for complete crabgrass control steps.

Crabgrass killers are not difficult to use, as long as you follow all label directions and safety warnings carefully. Here are some things to keep in mind when using pre-emergent and post emergent crabgrass killers:

  • Pre-emergent herbicides must be used at the proper time. This means before the weed seed has been allowed to grow, which will be in early spring. They can be applied once the soil temperature reaches 55 degrees for three consecutive days.
  • Post-emergent herbicides should be applied when temperatures are below 85 degrees, and on a low humidity day.
  • Pre-emergents should be watered in. After applying a post-emergent, do not water or mow the treated areas for at least 24 hours.
  • Some pre-emergent crabgrass products are combined with a fertilizer and are commonly known as weed and feed products. Since most lawns often do not need fertilizer in the spring, aim for a fertilizer-free product or one with slow-releasing nitrogen.
  • Post-emergent herbicide products are often labeled for use on specific types of turf grass, and each product will work on different grasses. Check the label carefully to avoid using the wrong product.
  • If you use a pre-emergent and still see some crabgrass, try to target the weeds early with a post-emergent product. If crabgrass is persistent into mid-July, even a post-emergent product will likely be ineffective. Keep in mind that these weeds will die with the first frost, so it is best to wait it out.

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