Centipede Lawn

Probably need to improve drainage so it's not soft, but let's wait for the experts to reply.

Let me address fertilization of the centipede. You can fertilize now, no specific time frame between applying herbicide for weed control and lawn fertilization. What should you fertilize with? Look for a 15-0-15 lawn fertilizer, something very close, and apply 3 1/3 lbs per 1000 sq ft of lawn - that’s equal to 1/2 pound of nitrogen (N) per 1000 sq ft. Repeat that in mid-June-early July and you are done for the year. Centipede doesn’t need or like high rates of fertilization used on St Augustine or Bermudagrass. Fertilome and LESCO make 15-0-15.

Lawn aeration or aerification is good, particularly for compacted soils or lawns with heavy thatch. If you want to do it, wait until the grass is in active growth - May through summer. Compaction & Aerification - LSU AgCenter

Soft spots - brown (dead or dying) grass? Could be thatch, low areas that hold water and stress grass, could be a lawn fungal disease issue, etc. and those 3 are often related. Photos posted can help here for potential diagnosis. Are the brown grass areas circular in shape? If so, that’s often large patch fungal disease. Large Patch - LSU AgCentet

What does weeding mean? You pulled them or sprayed them? If sprayed then with what? Pictures help!!