Does Grass Seed Go Bad?

Does Grass Seed Go Bad

Does Grass Seed go bad?

So you bought a bag of grass seed, with the intention of seeding your lawn.

One week goes by, and you haven’t managed to plant it yet.

“Next weekend,” you promise.

6 months later, you’re carrying around a completely sealed bag wondering,

“Does grass seed go bad?”

In short, the answer is yes. If enough time passes the seeds won’t germinate.

The good news is that grass is very durable, and it can take years for the seeds to die.

Keep reading to discover the complete answer to the question “does grass seed go bad?”

How long does grass seed stay good?

“So seriously,” you’re saying, “can grass seed die?”

While this particular seed is known for being more resistant than others, sadly, it too can perish.

For those wondering, “does grass seed go bad with age?” the truth is that yes, it does.

Grass seed germination decreases over time. That means that the longer you store the seed, the less likely those seeds are to grow.

What’s more, many brands stamp an expiration date on the bag.

While this date might not answer the question “does grass seed go bad after a year?,” there’s a general principle you can follow.

For the best turnout possible, you want to use seed that’s less than a year old. Grass seed of this age provides optimal germination.

But you might be wondering, what are the odds of grass seed germination for an open bag?

What about if it’s opened?

An open bag of grass seed can be quite the conundrum.

How do you store an open bag? How quickly will it go bad?

Here’s the thing: an unopened bag of grass seed will probably last longer than an open one. However, the state of the bag is not the only thing that determines how long the grass will last.

How you store the seed will also determine its lifetime.

If you have a closed bag that you leave exposed to the elements, and an open bag that you properly store, odds are you’ll find that the open container lasts longer. Properly storing seed makes all the difference when it comes to shelf life.

How do you store grass seed?

The most important thing to remember when addressing the questions, “does grass seed go bad” is to consider what preventative measures you’ve taken to preserve it.

To keep your grass seed good for the next planting season, follow these steps:

Ensure the seed is dry and clean, then store in a plastic container. The container should be difficult for rodents to access, and also spill-proof. The last thing you want is to sweep grass seed off your basement floor. Keep the container out of the reach of children and pets as well.

Keep in a cool, dry, and dark place. Store your container somewhere that doesn’t get much sunlight or humidity. To ensure that the grass seed stays fresh longer, you want to find a place around your house that remains above freezing, but below 70 degrees Fahrenheit.

Remember, the better the storage practice, the more germination you’ll have during growing season.

Does grass seed go bad when frozen?

With the farmer’s almanac seeming more like an archaic method of the past, it’s easy to forget about winter’s last frost.

Even worse, unpredictable weather can make it difficult to protect your seedlings from freezing temperatures.

In this scenario, knowing the answers to questions like “how long does it take for grass to grow?” and “how does grass grow?” can make all the difference.

What’s important to note is that grass seeds are durable, and are usually unaffected by freezing temperatures.

The seeds will simply remain dormant until more optimal weather conditions come about.

The reason lies in the answer to “how does grass grow?”

Grass seeds won’t begin germination until they’ve received enough moisture and heat to grow roots.

Knowing how to plant grass seed can dramatically impact the amount of grass that sprouts up during growing season.

Too much frosts or moisture will actually inhibit the plant from starting the growth process.

Planting grass seeds in the summer is one of the most ideal methods because it produces more optimal growing conditions. Keep in mind that while the seeds might not go bad if they’ve already been planted, leaving unplanted seeds in the elements can affect their germination.

Do different grass seeds last longer than others?

Some species of grass are naturally engineered to have longer lasting seeds than others.

Because different types of grass have adapted to different environments, some seeds can stay viable for much longer than others.

For example, it’s estimated that perennial ryegrass seeds can last around 5 years, while more delicate kinds, like weeping lovegrass, can die out rather quickly.

Additionally, how you respond to the question, “how long does it take for grass to grow?” depends on the type of grass you use.

In general, the process can take anywhere from 5 days to 1 month.

Always consult packaging information for estimations on how long your particular seeds can last.

Does fertilizer go bad?

Fertilizer comes in two forms: dry or liquid. Depending on the kind of fertilizer you use the shelf life of the product will vary.

The fertilizer’s chemical make up, and if includes any pesticides or herbicides, can impact it’s effectiveness.

Generally, dry fertilizer lasts indefinitely, since it’s comprised of soil nutrients. Some liquid fertilizers also don’t go bad, depending on their composition.

What’s more, mineral fertilizer has an infinite shelf life, whereas fertilizer made of organic matter will expire.


So now that you have an answer to the question, “does grass seed go bad?”, you can take the right precautions to protect the seed.

Don’t forget, the best way to get the most germination is to plant your grass seed shortly after purchase. If you want lush grass that allows you to put your Worx Gt2 to good use, you need to give it the best fighting (or growing) chance.

However, if that’s not possible, another way to protect the seed from going bad is invest in airtight, pest proof container.

When storing your grass seed remember this simple principle: keep it closed, keep it dry, keep it cool, keep it alive.

Next articleWeed Wacker Reviews
Welcome, my name is Otto Greenfelt and I love nothing more than chilling out in my garden. People were always asking me for tips on just how I got my garden looking so cool so I started give them advice on anything really, ranging from planting tips to the best best tools for keeping my lawn looking pristine. I even recommended some great BBQ's! This has led to the development of your one stop shop for all things garden related. Please do browse our articles and get in touch with any of your own tips and advice. We always love to hear from our readers.