Crabgrass is an invasive annual weed that can quickly get out of hand if not properly prevented using crabgrass preventers and pre-emergent herbicides, or killing crabgrass using post-emergent herbicides. Crabgrass will begin to germinate when the soil temperatures reach approximately 55 degrees for four or more consecutive days and continue to germinate throughout the spring and early summer months as the ground temps approach 70 degrees. 

Smooth crabgrass and large crabgrass are the two most popular species of crabgrass in cool-season lawns – particularly the Northeast.  Applying a pre-emergent – such as prodiamine in early spring (April) as soil temperatures are consistently in the low 50s, and a second application such as dimension in late May as soil temperatures begin to hit the 60s – will help prevent the germination of new crabgrass.


Crabgrass is an annual weed that frustrates homeowners year after year. It gets its name from how it grows—low to the ground with stems that radiate out from the center of the grass clump, resembling crab legs. When it comes to battling crabgrass in the lawn, the odds are stacked in the weed’s favor:

  • It germinates when soil temperatures reach between 55 and 65 degrees Fahrenheit, the average temperature during the spring and fall seasons in most areas.
  • Ungerminated seeds live in the soil for up to 30 years before sprouting.
  • A single crabgrass plant can produce 150,000 seeds during the growing season.
  • The weed can grow vigorously in hot, dry conditions.
  • It favors the thin and bare spots in your lawn.

Features of Crabgrass Killer

  • CRABGRASS KILLER: Crabgrass Killer for Lawns kills crabgrass and other listed grass weeds — to the root
  • EASY APPLICATION: The convenient sprayer connects to a garden hose and automatically dispenses the crabgrass killer
  • USE ON: Kentucky Bluegrass, Perennial Ryegrass & Fescue lawns. Does not harm your lawn.
  • RAINPROOF PROTECTION: Rainproof in 1 hour
  • COVERAGE AREA: Treats up to 5,000 square feet

Types of Crabgrass Killers

There are two types of crabgrass killer. The preventive type keeps seeds from germinating and the other type kills mature plants. The best overall product will take care of crabgrass and other weeds that are choking out your lawn. However, it also depends on the time of year that you plan to tackle the weed.

Pre-emergent Herbicides

Post-emergent Herbicides

Selective vs. Nonselective


Safety first. Use gloves, goggles, and long sleeve shirt or whatever you want to avoid getting the Tenacity on your skin or eyes. I typically like to mix all 3 of these together is a smaller bottle first and then add to my 1 gallon sprayer and then fill the rest with water.

Product information

Product Dimensions10 x 6 x 3 inches
Item Weight2.29 pounds
ManufacturerBayer Advanced
Item model number704115A
Customer Reviews3.8 out of 5 stars    211 ratings
3.8 out of 5 stars
Best Sellers Rank#50,728 in Patio, Lawn & Garden
#232 in Weed Killers
Is Discontinued By ManufacturerNo

Prices of Crabgrass KillerCrabgrass Killer

$14.55 – $94.99

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