Can You Seed the Lawn & Fertilize at the Same Time?

Fertilizer

• Avoid applying too much nitrogen to the soil before seeding. Excessive nitrogen burns up grass seeds. Use half the normal amount or 1/2 lb. per 1,000 square feet, as suggested by the University of Minnesota. U se a 5-10-5 starter fertilizer at a rate of 20 lbs. per 1,000 square feet, according to the University of California.

Fertilizer Application

• Spread half the fertilizer vertically over your yard with a rotary spreader. Applying the rest horizontally over the soil achieves an even coverage. Work the fertilizer into the first 2 to 4 inches of topsoil, as recommended by the University of California. A tiller works the fertilizer into the soil and breaks up dirt clumps in the lawn area. Water the area to seed on moist soil.

Seeding

• Sow grass seeds immediately after applying fertilizer. The amount of grass seed you distribute depends on the type of grass planted. Apply 1 lb. of Bermudagrass seed per 1,000 square feet, according to Texas A&M University. Applying more grass seed than recommended for your type results in grass seedlings competing with each other, slowing establishment, according to the University of Minnesota. Cover the grass seed with 1/8 inch of compost or dirt.

After Care

• Water the grass seeds after sowing to keep the soil moist. Seeds won't germinate in dry soil. Reduce the watering schedule when the grass seedlings emerge. Overwatering grass results in rotting. Keep off the lawn as seeds germinate and grow. Heavy foot traffic tramples new grass seedlings, according to the University of Minnesota. Fertilize the new lawn in six to eight weeks with 1 lb. of nitrogen per 1,000 square feet.