How to Grow Grass Fast: 8 Steps for a Rapidly Lush Lawn

Choosing the right seed for your climate (cool-season grass or warm-season grass) will help ensure your seed is successful.

Cool-season grasses are grown in more northern climates. The fastest-growing varieties include the following: 

• Tall fescue germinates in 7–12 days; established turf typically within 5–8 weeks.

• Both perennial and annual ryegrass germinate in just 5–10 days, with an established turf in 5–8 weeks.

• Rough bluegrass germinates in 7–10 days; established in 5–8 weeks.

Warm-season grasses are grown in the southern parts of the U.S. The fastest-growing varieties include the following: 

• Buffalograss germinates in 14–30 days and is established between 6–12 weeks.

• Bermuda grass germinates between 5–30 days. An established lawn takes 6–12 weeks.

• Centipede grass germinates in 2–3 weeks of seeding, with turf becoming established in 6–9 weeks.

If you plan to spread fertilizer on your grass to give it an extra boost while it’s growing, you’ll need to plan ahead and purchase the right type of fertilizer. There are two types of fertilizer: fast release and slow release. Fast-release fertilizers work quickly, as the name implies, but work best on already-established lawns.

Consider using a slow-release fertilizer to ensure the nutrients sink into your new grass correctly. You should also choose an NPK fertilizer with a higher nitrogen and potassium percentage with only a small touch of phosphorus. 

You’ll want to plant your grass seed according to the time period of active growth for that seed. Doing so will help your lawn establish faster.

• Cool-season grasses germinate fastest in soil that is between 50–65 degrees Fahrenheit. This is usually late summer or early fall when day temps are between 60–70 degrees Fahrenheit. 

• Warm-season grasses germinate faster when soil temperature is between 70–90 degrees Fahrenheit, typically between late spring and early summer when daytime temps are between 80–95 degrees Fahrenheit.

• If you live in a transitional climate, sow warm-season grass in the early spring and overseed with a cool-season variety when temperatures begin to drop.

Before you plant any seed in your yard, aerate your lawn and prepare the soil. Adequate drainage will help grass establish long roots, and proper amendments will ensure the grass stays moist as it germinates. Hire a local lawn aeration company if you need help with this step. 

• Do a soil test to see what nutrients your dirt is lacking and amend accordingly. Most grass likes a soil pH between 6–7.

• Thoroughly rake the area to remove any rocks or other debris from the planting area.

• If you are overseeding a lawn, you’ll still need to rake and dethatch around any planting area.

• Till the soil where you plan to plant the seed.

• Enrich the soil with amendments such as compost.

• Some landscapers use a low-nitrogen fertilizer in the soil before planting the seed, but this can also be done later.

• Smooth the soil out so that it has an even surface.

• Use an aerator to make sure the surrounding soil has adequate drainage. 

Small patches of grass can be sown by hand. For larger areas, seeding evenly is the key to having a lush, even lawn.

• Use a seed spreader for uniform distribution.

• Set your spreader to the recommended rate for the type of seed.

• Add half the bag of seeds and spread in one direction, then add more seeds and spread in the opposite direction.

• Topdress the seeds with peat moss or a thin layer of soil to help keep the seeds in place and moist as they grow.

• If you haven’t already, use a fertilizer spreader to evenly distribute a lawn starter fertilizer (low-nitrogen).

• Lightly tamp down the soil. 

Like most types of seed, grass needs to stay moist in order to germinate. Here’s how to water your lawn for the best results. 

• Water gently three times a day for the first week. Just 5–10 minutes is long enough.

• Continue to water two times a day (early morning and evening) for the next couple of weeks or until the seeds begin to grow.

• If there is an unseasonably warm day, water your grass as needed.

• Use a sprinkler or keep the hose on a gentle setting so you don’t wash away your seeds.

• Once grass is high enough, continue to water your lawn about 1 inch per week, in the early mornings or evenings. 

As excited as you might be about your new lawn, resist the urge to mow too soon. Wait until the grass has grown at least 3–4 inches. 

One of the fastest ways to have an established, lush lawn is to install sod rather than seed. This near-instant grass is satisfying, but it’s not without work.

• The soil must be prepared as above, and it must be even and with plenty of good drainage.

• New sod should be watered at least twice a day to ensure the roots take to the soil below.