Hello all Zone 5 - Rhode Island - not coastal.
This spring, I replanted my front lawn (3000 sq ft). I realize the spring is not the best time to plant, but I had to do it. I top-dressed with a loam-compost mix. I didn't use Tupersan when planting. Now, in some sections of the lawn, there are large clumps of crabgrass. There is too much to kill it with a crabgrass killer. I would like to over-seed the front lawn again this fall with a high-quality seed. What do I do with the crabgrass? Should I just kill it will Round-up and start over, or can I just use the slit-seeder, basically cutting through the crabgrass.
Thanks for your time.