Q: How do I repair yellow burn marks from too much fertilizer?
— Sharon, Egg Harbor Township, New Jersey
A: Roger says: Once the burn marks show up there is nothing you can do but replace the grass. I would cut out the area, remove 1 inch of soil, add new soil and seed, or sod, depending on which would blend in faster, which is usually the seed. If you ever spill fertilizer over a small area, rake it up and remove as much as possible, then water the area heavily for several weeks.