How to Seed a Lawn: New Lawn From Bare Soil, Step by Step
To seed a lawn from bare soil, time the planting to your grass type, prepare a firm and level seedbed in the top 4 to 6 inches of soil, spread seed at the rate for your species, rake it to a 1/8 to 1/4 inch depth, and keep the surface moist until germination. Cool-season grasses go down mid-August to mid-October. Warm-season grasses wait for soil near 65 degrees. This guide covers a brand new lawn, not an existing one. If your turf is already there and just thin, see how to overseed a lawn instead.
When is the best time to seed a new lawn?
The best time to seed depends on your grass type. Cool-season grasses (Kentucky bluegrass, tall fescue, perennial ryegrass, fine fescue) establish best when planted mid-August to mid-October, when soil is still warm but air is cooling. Warm-season grasses (bermudagrass, zoysia, centipede) need soil near 65 degrees Fahrenheit, so plant late spring into early summer after the last frost.
Iowa State University Extension names mid-August to mid-September as the prime cool-season window, and University of Maryland Extension extends it to mid-October in milder zones. Fall works because annual weeds like crabgrass have stopped germinating, so your seedlings face less competition.
Spring is the second-best window for cool-season grass. Seed early, once daytime temperatures hold in the 60 to 75 degree range, so the lawn roots before summer heat. Spring-seeded lawns often fight more weed pressure and may need a season of patience.
Step-by-step: how to seed a lawn from scratch
Seeding a new lawn runs in a fixed order: test, clear, grade, amend, level, sow, cover, feed, water. Skipping the soil work is the most common reason new lawns fail. Follow the steps below in sequence, since each one sets up the next.
- Test the soil. Pull a soil sample and send it to your state Cooperative Extension lab. Turf grows best at a pH of 6.0 to 6.8 (University of Maryland Extension). Add lime to raise pH or elemental sulfur to lower it before you plant.
- Clear the area. Remove existing grass and weeds with a sod cutter, or kill them with a non-selective herbicide and wait the label-stated interval. Take out rocks, roots, and debris.
- Establish grade. Slope the surface away from the house at 1 to 2 percent (Pennington) so water drains off the foundation. Fill low spots that would pond.
- Amend and till. Work compost or topsoil into the top 4 to 6 inches. Iowa State University Extension calls for at least 4 to 6 inches of quality soil under a new lawn.
- Level the seedbed. Rake the surface to break clods down to pea or marble size. A firm, fine bed gives every seed contact with soil.
- Spread the seed. Use a drop spreader on lawns under 5,000 square feet and a broadcast spreader on larger areas. Sow half the seed in one direction and half crosswise for even coverage.
- Cover the seed. Lightly rake or drag so seed sits 1/8 to 1/4 inch deep. Roll the area with a lawn roller to press seed into the soil.
- Apply starter fertilizer. Use a high-phosphorus starter blend (a common analysis is 20-5-10 at 5 pounds per 1,000 square feet, per Iowa State University Extension) to feed root development. Phosphorus is the number that matters most at seeding.
- Water in. Mist the surface so the top inch stays moist. Move to a maintenance schedule once seedlings are up.
How much seed do you need, and how long until it grows?
Seeding rate and germination speed both depend on species, so match them to your grass. Rates below come from University of Maryland Extension and Iowa State University Extension. Sow at the species rate, not heavier: crowded seedlings compete and thin out. The table pairs rate, germination time, and the planting window so you can plan the whole job from one place.
| Grass type | Season | Seeding rate (lbs / 1,000 sq ft) | Germination (days) | Best planting window |
|---|---|---|---|---|
| Kentucky bluegrass | Cool-season | 2 to 3 | 14 to 21 | Mid-Aug to mid-Oct |
| Tall fescue | Cool-season | 6 to 8 | 7 to 14 | Mid-Aug to mid-Oct |
| Perennial ryegrass | Cool-season | 5 to 9 | 5 to 10 | Mid-Aug to mid-Oct |
| Fine fescue | Cool-season | 4 to 6 | 7 to 14 | Mid-Aug to mid-Oct (shade) |
| Bermudagrass | Warm-season | 1 to 2 | 10 to 30 | Late spring, soil 65F plus |
Most lawns germinate inside 5 to 21 days (Lowe’s, Pennington). Perennial ryegrass is fastest, often up in 5 days, which is why it shows up in many seed blends. Kentucky bluegrass is the slowest common pick at 14 to 21 days. Expect another 4 to 10 weeks of growth before the lawn roots well enough to take traffic.
To size your order, measure the lawn first. Our guide on how to measure lawn square footage walks through the math so you buy the right amount of seed and starter fertilizer the first time.
How do you water new grass seed?
Water new seed lightly and often, never deep and infrequent. Keep the top inch of soil moist but not soggy from sowing until seedlings reach about an inch tall. That usually means watering two to three times a day with a light spray (Lowe’s, Pennington), since shallow seed dries out fast in sun and wind.
Stop adding water once puddles form, because standing water floats seed and rots it. Apply roughly a quarter inch per session (University of Maryland Extension), then let the surface absorb it before the next pass.
As seedlings establish, stretch the interval and water deeper to push roots down. The target moves toward one inch per week total. For zones that never seem to take, our guide on getting grass to grow in shade and tough spots covers compaction, slopes, and low light.
When can you first mow and fertilize a new lawn?
Wait to mow until the new grass reaches about 3 inches tall, then cut no more than the top third (Lowe’s, Pennington). Mowing too early or too short tears shallow-rooted seedlings out of the ground. Make sure the soil is dry enough that the mower wheels will not rut the surface.
The starter fertilizer applied at seeding feeds the lawn for roughly 6 to 8 weeks. After that, follow a maintenance program matched to your grass. Our year-round grass maintenance schedule lays out the cool-season and warm-season calendars side by side.
What does it cost to seed a new lawn?
Seeding a new lawn from scratch costs more than overseeding because of the site prep. Industry pricing data from LawnStarter (2026) puts professional seeding at $0.09 to $0.15 per square foot for straightforward jobs, with full new-lawn installs that include grading and soil work running higher. DIY material cost lands around $149 to $449 for seed, starter fertilizer, and rented tools.
| Lawn size | DIY materials | Professional (basic) |
|---|---|---|
| 1,000 sq ft | $60 to $150 | $90 to $150 |
| 5,000 sq ft | $200 to $400 | $400 to $750 |
| 1/4 acre (about 10,900 sq ft) | $350 to $700 | $980 to $1,634 |
Hydroseeding and slice seeding cost roughly $0.07 to $0.21 per square foot (LawnStarter, 2026) and suit large or sloped sites. For a full breakdown by service and region, see our 2026 lawn care cost guide.
Seeding a new lawn vs overseeding: what is the difference?
Seeding a new lawn means building turf on bare soil, which requires clearing, grading, soil testing, and starter fertilizer. Overseeding means dropping seed into an existing lawn to thicken it, with no grading and far lighter prep. The two jobs use different rates, timing tolerances, and budgets, so do not treat them as interchangeable.
If you are starting from dirt, this page is the right one. If you have a thin or patchy lawn that is mostly intact, follow our guide on how to overseed a lawn, which uses a lower seeding rate and skips the demolition. For small dead zones rather than a whole yard, see how to fix bare spots.
Last reviewed: June 2026
HMNDP Editorial Team, reviewed by HMNDP turf and horticulture editors.
Frequently asked questions
When is the best time to seed a new lawn?
Time it to your grass type. Cool-season grasses (Kentucky bluegrass, tall fescue, perennial ryegrass, fine fescue) establish best mid-August to mid-October, when soil is warm and air is cooling and weed pressure drops. Warm-season grasses (bermudagrass, zoysia) need soil near 65 degrees Fahrenheit, so plant late spring into early summer after the last frost.
How long does grass seed take to germinate?
Most lawn grasses germinate in 5 to 21 days. Perennial ryegrass is fastest, often up in 5 days. Tall and fine fescue run 7 to 14 days, Kentucky bluegrass takes 14 to 21 days, and bermudagrass can take 10 to 30 days. Expect another 4 to 10 weeks of growth before the lawn roots well enough to take foot traffic.
How much grass seed do I need for a new lawn?
Rate depends on species, per University of Maryland and Iowa State Extension. Use 2 to 3 pounds per 1,000 square feet for Kentucky bluegrass, 6 to 8 for tall fescue, 5 to 9 for perennial ryegrass, 4 to 6 for fine fescue, and 1 to 2 for bermudagrass. Measure your lawn first, then buy to the species rate. Heavier is not better.
How do you prepare soil for seeding a new lawn?
Test the soil and adjust pH to 6.0 to 6.8 with lime or sulfur. Clear old grass, weeds, and debris, then grade the surface to slope 1 to 2 percent away from the house. Work compost into the top 4 to 6 inches, rake the bed to pea-sized particles, and firm it so seed makes good contact with soil.
How often should I water new grass seed?
Water lightly two to three times a day so the top inch of soil stays moist but not soggy, from sowing until seedlings reach about an inch tall. Apply roughly a quarter inch per session and stop once puddles form, since standing water floats and rots seed. As the lawn establishes, water deeper and less often, moving toward one inch per week.
When can I mow a newly seeded lawn?
Wait until the new grass reaches about 3 inches tall, then cut no more than the top third. Mowing too early or too short rips shallow-rooted seedlings out of the ground. Make sure the soil is dry enough that the mower wheels will not rut the surface, and keep blades sharp to avoid tearing young blades.
What does it cost to seed a new lawn?
Professional seeding runs about $0.09 to $0.15 per square foot for basic jobs in 2026 (LawnStarter), so 1,000 square feet costs $90 to $150 and 5,000 square feet costs $400 to $750. DIY material cost for seed, starter fertilizer, and rented tools lands around $149 to $449. New lawns cost more than overseeding because of grading and soil prep.
What is the difference between seeding a new lawn and overseeding?
Seeding a new lawn builds turf on bare soil and needs clearing, grading, soil testing, and starter fertilizer. Overseeding drops seed into an existing lawn to thicken it, using a lower rate and far lighter prep. They are different jobs with different rates, timing, and budgets, so use the method that matches your starting point.