Spring is always a good time to seed your lawn. Soil is warming up, growth is ramping up, and seeds germinate quickly in these conditions. Whether you're patching bare spots or thickening thin areas, getting grass established now sets you up for a stronger lawn heading into summer.
Both warm-season and cool-season grasses can be seeded in spring, though the timing differs. Here's how to get it right.
Why spring is a good time to seed your lawn
Growth conditions are ideal. As soil and air temps rise, grass roots grow deeper and blades grow longer. When your existing lawn starts greening up, that's a sign conditions are almost right for seeds to germinate too.
You're building resilience before summer. Summer is hard on lawns. Heat, drought, foot traffic. A thick lawn handles stress better than a patchy one. Filling in bare spots now gives new grass time to establish before things get tough. If you're working on a larger area, our guide to overseeding covers the full process.
It's good for more than your yard. Dense turf reduces soil erosion and filters runoff before it reaches local waterways. Seeding isn't just cosmetic. It’s eco-friendly lawn care, too.
When to plant grass seed in spring
Timing depends on your grass type and location.
Cool-season grasses (fescue, bluegrass, ryegrass): Seed when daily temps average 55–75°F. In most northern and transitional areas, that's early to mid-spring.
Warm-season grasses (bermuda, zoysia, Centipede): Seed when daily temps average 70–90°F. That's late spring in most of the South. If you've got a warm-season grass that doesn't seed well (most of them), late spring is also a good time to propagate with sod, plugs, or sprigs.
If you're not sure what type of grass you have, the grass ID guide can help you figure it out before you buy seed.
Sunday Tip:
If you seed before temps are in the right range, germination will likely falter. Patience for the right temps pays off here.
How to seed your lawn in spring
Wondering how to plant grass seed? Here's a quick run-through.
- Pick the right seed for your grass type and region. (Not sure? Try our free Seed Finder Tool.)
- Mow your lawn shorter than usual and remove clippings so seed reaches the soil.
- Spread seed evenly at the recommended rate of 2 lbs/1000 sq ft. Our grass seed instructions cover the specifics.
- Water lightly once or twice a day to keep the soil moist (not soaked) until seeds germinate and reach about 2-3 inches tall. If you're not sure whether you're doing it right, our watering guide can help.
Sunday Tip:
Keep kids and pets off newly seeded areas until the grass is established. Fencing it off works wonders for extra curious family members.
How long does grass seed take to grow?
Germination times vary by grass type:
- Perennial ryegrass: 3–7 days
- Fescues: 6–12 days
- Bermudagrass: up to 21 days
- Kentucky bluegrass: Up to 21 days
A few things to keep in mind:
Weeds are germinating too. Spring conditions that favor grass growth also favor spring weed growth. Keep pulling them as they appear. Don't apply pre-emergent herbicides if you're seeding, since they'll prevent your grass seed from germinating.
Spring-seeded grass grows more shoots than roots. That means it may not be as tough when summer hits. Watch for stress and reseed if needed.
Thick grass handles summer better. Even if spring-seeded grass isn't as deeply rooted as fall-seeded grass, a dense lawn still outperforms a thin one when conditions get hard.
What if you miss the spring seeding window?
Spring seeding works best when temps stay in the ideal range. Once daily averages hit 80°F for cool-season lawns or 100°F for warm-season lawns, the window closes.
If you miss it:
- Cool-season lawns: Keep patching bare spots as needed, but save major seeding for fall. (That's actually the best time to seed cool-season grass anyway.)
- Warm-season lawns: Wait for the temps to start to cool off again. You get another chance towards the end of the summer.
Why won't my grass seed grow?
If seed won't take in certain spots, the problem is usually something other than timing.
Check for:
- Soil compaction
- Too much shade
- Watering issues (too much or too little)
- Not enough organic matter
Sometimes the lawn is trying to tell you something. Worth listening before you throw more seed at it.
Fix the underlying issue first, then try again. Our soil test can help identify what's going on. If you're stuck, reach out to our team for help.
Let's get growing
We'll map your lawn and recommend the right seed for your grass type and region.
Cited Sources
Lawn Care: The Easiest Steps to an Attractive Environmental Asset. Cornell University.
Lawn Management Through the Seasons. Penn State University Extension.
