re: How do I get rid of crabgrass in my lawn?

I had some success with Atrazine but you have to be careful, too much and it will damage the St. Augustine. Hot weather may make this worse if I remember correctly. And it didn't kill off the crab grass though it knocked it back pretty well. My lawn is very small so after the Atrazine I hand weeded. The crab grass still comes back a bit but it I keep on top of it and it doesn't take long to pull it out.