How long can grass seed be stored and still germinate?

• <div><p>When stored under ideal conditions, grass seed lasts anywhere from 10 to 18 months from the testing date without any real decrease in the germination rate. You can still use the seeds after this timeframe, but the germination rates drop 10% to 20% each year. </p><p>If you’re just embarking on an overseeding project, using seeds that have been in storage for a few years isn’t too big of a deal. However, if you’re planning on redoing your entire landscape, your best bet for a healthy, luscious lawn is to use new seeds.</p></div>

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Q: Why should you overseed your lawn?

• <div><p>Along with helping your grass grow in thicker and healthier, overseeding better equips it against hungry insects, common lawn diseases, drought, heavy foot traffic, and other foes that can weaken or kill the grass over time. By investing the extra time and money into overseeding, you&rsquo;re lowering potential costs of fertilizer, pesticides, or possibly reseeding the lawn in the future.</p></div>

Q: How long does it take for seeded lawns to grow fully?

• <div><p>Germination varies with grass type and climate, generally taking 7 to 21 days. Full lawns develop over a few months.</p></div>

Q: Should you water after putting down grass seed?

• <div><p>Yes, you should <a href="https://www.angi.com/articles/how-long-to-water-grass-after-seeding.htm">water your grass after seeding it</a>. During the first couple of weeks after laying the seed, you should water the lawn two or three times per day for 10 to 15 minutes each session. After that, you can switch to 20- or 30-minute watering sessions every other day.</p></div>

Q: Do I need to aerate my lawn before seeding?

• <div><p>Aerating a lawn before seeding it or adding new grass seed is a smart decision. By loosening up compact soil and allowing it to take in more air and water, your seeds will have an easier time establishing roots and growing. Aerating beforehand also means your seeds will have better contact with the soil, so more of your seeds have a chance to germinate. If you do plan to aerate your lawn before seeding, aerate about two days before you plan to start seeding.</p></div>

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Verified Reviews for Lawn Irrigation pros in Yah-ta-hey, NM

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Last update on June 28, 2025

Reviewed in June 2025
He did a great job painting our bathroom, I highly recommend him.
Lot Pro Services LLC
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Reviewed in April 2024
Paul was great. He came out to service our door. My first words were â Iâ m not replacing the doorâ . After looking at the damage and being honest with the compatibility of parts with our door we quoted a new door and I ended up replacing it. He was easy to work with and pushed to get it...
Don's Garage Doors
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Reviewed in August 2023
Could not have asked for better service. Attention to detail was amazing.
Purus Cleaning
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Reviewed in April 2023
They did a great job for us. We needed AC installed in our house to get it ready to sell. Everything went smoothly despite the need for some complicated drilling through a foundation wall. Greg was easy to communicate with and very honest.
Bristol Enterprizes
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Reviewed in March 2023
This privately owned company is very professional and friendly! They did a outstanding job painting the kitchen and pressure washing the garage! Pricing is very reasonable compared to other businesses! I highly recommend this company...you won't be disappointed!
Lot Pro Services
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Reviewed in June 2022
I was happy with Germinator’s service. Their Manager was accommodating, and sent 2 Pros who worked hard to make sure I was satisfied. I will definitely continue with this housecleaning service.
Germinator USA
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Reviewed in June 2021
Edgar removed a very well established bush in my son's backyard. He did a great job. He was careful not to tear up the lawn when he brought his machine to grind up the stump into the yard. He helped with some digging so the machine could do its job. I was very pleased with his work. There is...
Ziggy's Tree Care
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Reviewed in March 2021
Paul came the same day we called to repaint our contrasting baseboard that was heavily scuffed. He painted, caulked, and reattached the trim, and it looks beautiful. He left our home looking clean and fresh!
Gallup Flooring, LLC
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Lawn Irrigation questions, answered by experts

Along with helping your grass grow in thicker and healthier, overseeding better equips it against hungry insects, common lawn diseases, drought, heavy foot traffic, and other foes that can weaken or kill the grass over time. By investing the extra time and money into overseeding, you’re lowering potential costs of fertilizer, pesticides, or possibly reseeding the lawn in the future.

Germination varies with grass type and climate, generally taking 7 to 21 days. Full lawns develop over a few months.

Yes, you should water your grass after seeding it. During the first couple of weeks after laying the seed, you should water the lawn two or three times per day for 10 to 15 minutes each session. After that, you can switch to 20- or 30-minute watering sessions every other day.

When stored under ideal conditions, grass seed lasts anywhere from 10 to 18 months from the testing date without any real decrease in the germination rate. You can still use the seeds after this timeframe, but the germination rates drop 10% to 20% each year.

If you’re just embarking on an overseeding project, using seeds that have been in storage for a few years isn’t too big of a deal. However, if you’re planning on redoing your entire landscape, your best bet for a healthy, luscious lawn is to use new seeds.

Aerating a lawn before seeding it or adding new grass seed is a smart decision. By loosening up compact soil and allowing it to take in more air and water, your seeds will have an easier time establishing roots and growing. Aerating beforehand also means your seeds will have better contact with the soil, so more of your seeds have a chance to germinate. If you do plan to aerate your lawn before seeding, aerate about two days before you plan to start seeding.

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