Does Grass Seed Have Expiration Date? Let us Find Out

Hand sowing grass, closeup
Closeup of hand sowing grass in garden

Many times, people sow the old seeds and spend their most precious time while nurturing and feeding those seeds without having a slight idea that those seeds would never result in a good product.

That is why it is always a good idea to check out the expiration date and quality of old grass seeds before using them in your lawn.

Expiration date of the grass seed can be found frequently stamped on the package, and it can go not good over time. Therefore, it is often suggested to discard any unused grass seed which has passed its expiration date.

With the aging of grass seed, is the percentage of germination decreases, requiring using more seed than usual to achieve adequate coverage. Hence the very straight answer to questions like, ‘Does grass seed go bad?‘ or ‘Does Grass Seed Have Expiration Date?’ is a simple YES!

How to Know If Your Grass Seed Has Expired?

It is difficult to say when grass seed has gone bad because there are not always clear signs. Even the expiration dates on boxes and bags are estimates that are highly dependent on storage conditions.

However, there are some clear indications that you should not try to plant your lawn with the grass seed you have stored.

Examine the seeds for signs of fungus or discoloration, as well as moist or clumpy areas. If any of these are found existing, it is surely best to discard the seed and buy a new batch.

Is It Possible to Store Grass Seed for A Long Time?

Grass seed usually lasts 2 to 3 years, but a seed that is less than one year old is best. However, there is some difference between seed types; for example, ryegrass seed will last up to 5 years, which is considerably longer than other common varieties such as Fescue grass seed and Bermuda grass seed.

Some Pointers for Keeping the Grass Seed New

Storing the Bag of Grass Seeds

First, while sowing grass seed, it is important to know how to store it properly for the best results, which involves the basic storage techniques such as the seed should be stored in bags with mesh air vents as much as possible. This helps air to circulate while keeping insects out.

The most important rule is keeping the bag in a cool, dry, and humidity-free setting while maintaining a temperature below 60 degrees Fahrenheit and relative humidity of less than 60%. Having a cool temperature is ideal but stop freezing your seeds at all costs.

Safety from Insects

When storing grass seed, it is important to keep insects and rodents away from it and to make sure the seed does not freeze. Another thing to think about is where you will keep your lawn seed.

Consider where you live and how cold it gets in the winter; a garden shed may not be the best option if the temperature drops below zero. Go for an enclosed garage or cellar instead. If you want to get the best results, make sure you buy high-quality grass seed, regardless of where you store it.


So, the next time, whenever you are planning to put those old seeds to some use, never go doing it without properly checking them. It might destroy everything, your time, lawn, soil quality, and other things involved.

Sandy Jensen
Sandy Jensen is the founder of OrganizeWithSandy and Works with Champalimaud Design where she curates and creates fresh ideas for designing and styling your life.

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