How to Kill Crabgrass “Look-a-Likes”
Whenever I hear someone say they have crabgrass in their lawn now before spring has really kicked in, I suspect they are really referring to one of the perennial grassy weeds that looks different than their good grass. Crabgrass plants do not show up until summer after they germinate in spring. Perennial grassy weeds live year after year, so you can see them in your lawn year round.
Some of the most common perennial grassy weeds are: Coarse Fescue, Quackgrass, Nimblewill, Timothy Grass, and Orchard Grass to name a few. Nimblewill is a little bit tricky so it very frequently gets confused with crabgrass. The reason is even though Nimblewill is a perennial, it goes dormant in winter taking on a brown color until around May. So folks think it is dead crabgrass. Be sure to look at both the early spring picture of dormant Nimblewill and the summer pictures showing actively growing Nimblewill.
I have some good news for you. Roundup has Sure Shot Foam that makes it a lot easier to kill the grasses you want to kill without killing the grasses you want to keep. Click here to read all Roundup Sure Shot Foam. As with all Roundup products, you still need to be careful not to spray your good grass. I like the Sure Shot Roundup because it is easier to control where it sprays. And more good news, you can seed those spots in 7 days after spraying.