After investing a good chunk of change on my herbicide collection I've began to wonder/ worry about shelf life. Unfortunately most chemicals come in large quantities and with about 4500 ft2 of turf most will take me decades to use. I'm not really concerned with the granular products more so with the liquids. I store them in the garage (not climate controlled) and while it never gets below 45 degrees in the winter, the summers in Oklahoma are brutal. The garage could be well into the 100 degree range.