I have a weed that looks kind of like crabgrass but it grows tall very quickly. What is it?
The weed you are dealing with is very likely yellow foxtail. Yellow foxtail is an annual like crabgrass, but tend to grow much more upright and usually pulls-up easily. It will die off in the fall and can only return next season from seeds germinating in the soil. Getting your lawn to grow thicker this fall and next spring, along with possibly using a pre emergence herbicide next spring, will reduce the chances of a repeat appearance next year.