I'm an idiot and did not put down a pre-emergent in Spring and now we have lots of crabgrass. I understand I can treat chemically now with herbicides like Tenacity or other methods, but once the grass is killed, don't I still have to physically remove it by hand? Is it easier to remove once it's dead? I'd like to reseed this Fall, but I also read somewhere that said that winter time weather will kill it and it will be gone by Spring. Not sure if they meant physically gone.
If I want to reseed within the next month, what's the best way to kill/remove these large patches now?

If I want to reseed within the next month, what's the best way to kill/remove these large patches now?
