[Lardman]

Does it go off ? 2 seasons ago I bought some Been and Queued own brand stuff, it's never been the best but this year it honestly looks to have no effected at all.  The destructions are long gone but I put 25ml in 1ltr and sprayed some dandelions about a week ago, they all look a picture of health. we've had no significant rain and they were given a good soaking in full sun.

Is it worth upping the mix or am I just wasting time ? I really only use it to spot treat weeds I can't dig out, would I do better buying something branding with a little more clout.

[JayG]

There's a bit of a contradiction out there in "Gurgle-land" - on the one hand many reports suggest it has a very long shelf life (years) whereas others say the same thing but describe that as being "over a year."   

I suspect its shelf life is much shorter when bought as a made-up solution, so if there are no signs of it starting to work by now you probably have to assume it's duff.

[DD.]

Get some Resolva 24. It contains two weed killers, one of which is Gylphosate. The other takes almost immediate effect while the Gylphosate gets to work. It makes it easy to spot what you may have missed.

[arugula]

It does have a shelf life and therefore a use by date, but it will also degrade more quickly if you store it outwith the ideal tempertures - too hot or too cold.

[noshed]

My last year's stuff seems to be working OK - the bindweed is going yellow (not that it will remove it from my rolling acres I don't suppose)