What I thought was crab grass in my yard has been identified by a yard professional as Dallas grass, which I had never heard of. Apparently, it doesn't grow from a seed. My questions are: where does it come from and, short of digging it up, how do I get rid of it?.
Dallisgrass is a perennial grass. While it does bloom and set seed, which it can germinate from, it comes back from the root system each year, making it a more tenacious weed than the annual crabgrass which comes up only from seed each year. You didn't say what type of lawngrass you are growing. If you have Bermuda or Zoysia grass, then wait until the Dallisgrass and lawn have fully greened up and treat with the same herbicides you would use to kill crabgrass—two brand names include Weed-Hoe or Weed-B-Gon Crabgrass Killer for Lawns. It may take more than one application, but you can control it.
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