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will grass seed go bad?

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  • May 12th, 2017 10:25 am
Deal Guru
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Feb 23, 2008
12850 posts

will grass seed go bad?

I have a bag of grass seed about 5 yrs now and used it to fill in some holes in my lawn. Is it still good? It was kept in the original bag and inside my garage where it sat for 5 winters and summers. Will it grow?
Lets Go Blue Jays!!!
5 replies
Deal Fanatic
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Nov 19, 2004
9239 posts
Cambridge, ON
Different seed will be viable for different lengths of time. 5 years may be pushing it for most seed, but you might be fine with any rye grass portion.

Only one way to find out.
Sr. Member
Mar 19, 2013
726 posts
Prince Albert, Sask.
Most seed companies are saying 2-3 years.
May 28, 2012
12282 posts
Magoo61 wrote: Most seed companies are saying 2-3 years.
Plus storage conditions affect the viability of most seeds (heat and moisture). A germination test can be done using a damp paper towel inside a ziploc sandwich bag...sprinkle in a set number of seeds and see how many sprout.
Deal Guru
Jun 7, 2005
10054 posts
I didn't even know they would go bad. I still have a couple unopened bags in my storage........
Deal Addict
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Aug 10, 2015
2044 posts
Elgin, ON
Good question.

Ideally, the seed should be used in 12-18 months. If using beyond that time frame, apply more liberally, as you may get a lower germination rate. If stored in ideal conditions, some ryegrass seeds may still be viable for up to about 5 years.

It looks like I should return some seed I bought. I bought 18kg, total but only ended up using about 5kg. At most, I'll use another 8kg by the end of next spring.


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