The Correct Amount of Time to Water a Lawn When Seeding

Preparing the Seed Bed

• The best time to plant grass can vary greatly between climate zones. Consult with your local agricultural extension service to determine the best time for grass planting. Till the soil to a depth of 6 to 8 inches and remove all rocks, wood and other debris from the area. Apply a non-selective herbicide several weeks before seeding to prevent weed growth, according to North Carolina State University horticulturist Erv Evans. If soil is compacted, add a 2- to 3-inch layer of organic matter like compost or manure to aid aeration.

Planting the Seed

• Choose the right seed for your area and usage. Some grass types require sunny conditions to grow properly. Others are more suitable for shady lawns. Use a spreader to sow the seeds evenly. Going over the area twice in two different directions will distribute the seed as evenly as possible, according to the Ohio State University turf website. Lightly cover the seeds with soil with a hand rake.

After Seeding

• A lawn roller is a tool used to pressed the seed into the soil so that it is in good contact with soil for rooting and drawing up the moisture and nutrients required for growth. These can be found at any lawn or garden supply store. Water the area to a depth of ½ inch. Apply a 1-1-1 ratio of nitrogen-phosphorus-potassium fertilizer to add nutrients for the new seedlings.

Correct Watering

• Germinating seedlings can die quickly if not kept moist. Use sprinklers to wet the surface four times each day, starting at 7 a.m. and finishing by 6 p.m., according to Joe Provey on the Popular Mechanics website. The seeded area should be kept moist but not wet. Saturate the area to a depth of 1 to 2 inches. Overwatering is as bad as underwatering grass seedlings. Do not allow seed bed to dry out at any time. Seeds will germinate in seven to 14 days. When seedlings sprout, water less frequently but deeper. A layer of straw mulch spread over the seed bed will help to retain moisture and prevent erosion of the topsoil. Irrigate the new lawn area regularly during the first year to help with root establishment.