Guess what? You might actually be seeing crabgrass in your lawn this time of year! It was late germinating this spring (we didn't see it in Fort Collins until late May), but now it's large and in charge. This is crabgrass in late May:
|Small (smooth) crabgrass (Digitaria ischaemum)|
|Small (smooth) crabgrass--growing in concrete!|
(That's a joke)
|Small (smooth) crabgrass near sidewalk|
This is not crabgrass; this is bromegrass (wide, coarse blade; often a "W" watermark on upper tip of leaf):
|Bromegrass in a bluegrass lawn|
|Annual bluegrass in a Kentucky bluegrass lawn|
|Tall fescue in a bluegrass lawn|
|The ligule is located like a collar on the inside of the leaf|
|Orchardgrass in the lawn|
|Yellow foxtail, which can easily be confused with crabgrass.|
The great news is that the same products that work on crabgrass
will work on foxtail.
|Yellow foxtail--look at that distinctive red color!|
If you want to control it now, use any herbicide product containing quinclorac (such as Ortho Weed Be Gon Max Plus Crabgrass Control, Fertilome Weed Out Plus Q or Bayer All-in-One Lawn Weed and Crabgrass Killer). Be aware it may take more than one application to completely kill this persistent weed. It's much easier to control when it's a seedling or use preemergence products in early spring.
The big point to make, with the exception of foxtail and crabgrass, is that quinclorac will not work to selectively remove tall fescue, bermudagrass, bromegrass or annual blugrass from your lawn. So identification of grasses that LOOK like crabgrass is essential before you start spraying herbicides willy-nilly.