Not a lot of use if it seems not to work really is it ?
I'd buy fresh !
Re: Glyphosate (roundu) storageDoes roundup have an expiration date? Does it go off? The containers indicate nothing about storage conditions or use by dates but as it breaks down in contact with the soil I would expect it to be prone to breaking down while in storage.
I found some in the shed. The bottle label was rather faded suggesting it had been there a while and it appears to not work.