Does Roundup have a shelf-life?

[caroline7758]

I have a big bottle of roundup which I bought at least 2 years ago. Don't want to waste my time using it if it's likely to have lost its umph!

[caroline7758]

[saddad]

Yes, but unless it has been in bright light, high temps.. etcetra, it will still be fine it is relatively stable...
:)

[Gazfoz]

Use it and if the weeds die then ok, if don't not ok

[Melbourne12]

I can't find the reference now, but IIRC Roundup keeps for at least 5 years.  If you look up glyphosate, it's said to be stable in air and not sensitive to light.  I'm certainly using some Roundup from last year and it's fine.

[OllieC]

It keeps for years!

[caroline7758]

Thanks- I'll try it out when it stops raining!