Tell the Truth – Will the Real Crabgrass Please Stand Up?
For all you folks out there who are as old as me, you remember the old TV show that had two imposters trying to get chosen over the real person based on the answers to questions from the celebrity panel. (For all you younger people, here is a link to watch one of those shows that features a young Betty White and Johnny Carson as panelists. Betty White is now 91 years old.)
Will there are more than two crabgrass imposters to confuse lawn owners, and this time of year it is easier to figure out the culprits. The reason is crabgrass is an annual weed that germinates when your soil reaches 55 degrees (here is a link to a soil temperature map for your area). Unless you live in South Florida, it is unlikely you have mature crabgrass plants in your lawn right now. So this means that if you are looking at a big old grassy weed in your lawn now, whether it is green or brown, it is likely one of those crabgrass imposters that crabgrass prevention application will not control.
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 Sure Shot Foam makes it a lot easier to kill the grasses you want to kill without killing the grasses you want to keep. 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.