I was at a farm last week and noticed a case of inoculant sitting on a table in the mixing area in full sunlight. I don't know exactly how long it takes when temperatures are 90 F in full sunlight to kill a significant number of the bacteria. But especially for new ground, we can't afford to take a chance. It's easy to forget the inoculant contains a living organism, and sometimes this results in product being left exposed. This can be a major issue. Try to keep your inoculant in the shade and at "room temperature." The bacteria can't stand extremes in temperature.