I have a bottle of plant magic oldtimers veg there in my shed but its been there for nearly 3 years will it be ok as i have read that they dont go out of date
If it has a very strong sulfur smell that is a bad sign. That's referring to organic notes with living micro organisms so I'm not 100% sure if it applies to you. Also, if you shake the bottle and it rattles that's also a bad sign. Nutrients will fall out of solution over time. Hot/cold swings don't help this.