How Long Will Unopened Grass Seed Last?

Grass seed remains viable for approximately one year. The percentage of viable seed is listed on the label along with the date tested. For best germination, purchase seed that was tested within the previous nine months. Germination rates decrease over time.

Keywords: planting grass seed, storing grass seed, grass seed viability

About this Author

Diane Watkins has been writing since 1984, with experience in newspaper, newsletter and web content. She writes two electronic newsletters and content around the web. Watkins has a Bachelor of Science degree in chemistry from Clemson University. She has taken graduate courses in biochemistry and education.