If it sits for a long period of time without adequate mixing you can have a problem.
We have had some stored over 2 years and never had an issue. We don’t keep it in a controlled climate either. Just leave it sitting on the concrete floor and get it as needed. As much as we have to spray we have to have it on hand. If I can see Matt I will ask him about storage over a period of time but we have never had an issue. We also have Remedy that is at least 3 years old still sitting. I bought it in bulk when the price was right. Used some last year and didn’t have an issue.
At daddy’s there is some 2-4-D and MSMA that has probably been sitting 10 years in the basement. I can’t say it’s good or bad. He bought it before he passed away and it is sitting where he left it.
