Even though you have killed most weeds and grass, you still need to remove the dead material. Rent a slit seeder from your local rental store and pour your selected grass seed into the seed hopper. Set the dial at one-half the application rate for your grass. read more
The overall approach: Choke the weeds out not with chemicals, but by creating a new lush lawn of healthy grass. Choose the Best Grass Jerry's yard is full of mature trees, which help shade his landscape. read more
The Smart Yard: 60-Minute Lawn Care (by Jeff Ball and Liz Ball) devotes a chapter to assessment. See this book for great tips on how to figure out how compact your soil is, how healthy your grass is, and so on. read more