Neem Oil Life Span

Hi there,

I have some neem oil I'm using on my plants but the bottle is a few years old, the thing is that there is no expiration date in the bottle so I'm wondering what's its life span as the plants I'm using it on have thrips and the neem oil doesn't seem to help at all.

neem oil is a good prevention for all kinds of bugs ..... here's a great way to get rid of thrips http://www.naturescontrol.com/thrip.html

thanks for the reply but I really want to know about the neem oil coz if mine is too old I'll get a new one