Pre-emergent weed killer is meant to stop weeds from growing, and is usually applied in the spring. If you have had issues with weeds, and have decided to get a head start on the problem before summer, pre-emergent helps. You also need to overseed, or reseed, the yard so that you can fill in all the bare spots where weeds have grown in the past. A thick lawn helps keep weeds out by denying the seeds access to the soil through the thick blades. However, before applying it, you should check the pre-emergent to ensure the type of grass in your lawn isn't affected.
Things You'll Need
- Grass seed (same as your lawn)
- Garden spreader
- Top soil
- Watering hose
Rake the lawn to remove dead grass and roots. The pre-emergent should take care of weeds before they emerge, and is applied in the spring before temperatures reach into the 50s. Wait at least six to eight weeks before casting seeds to ensure there is no affect from the pesticide.
Look at the package of grass seed. It should indicate an overseeding quantity. Fill the garden spreader with half of the recommended amount for your type of seed.
Walk over the lawn with the spreader, moving back and forth in rows. Repeat with the other half of the seed, in rows at a perpendicular angle to the first.
Sprinkle 1/4-inch of topsoil over the lawn, letting it fall between the blades of grass and over the seeds.
Water the grass to soak it down to 2 inches deep. Continue to water every day until blades of grass grow, and then water twice a week to equal 1 inch of water per week.
Tips & Warnings
- Do not over water or you will cause erosion that will wash away the seeds. Do not walk over the seeded area if possible, to keep from packing the soil or removing seeds with the soles of your shoes. Keep children and pets off the treated areas, since the chemicals could be harmful.