As you prepare to store leftover chemicals over the winter, it's important to follow good storage procedures. Developing proper chemical-storage habits can prevent tragedies and keep pesticides from falling into the wrong hands.
Container labels have instructions to help you properly store chemicals. This information includes temperature restrictions or warnings against temperature fluctuations, among other storage instructions.
All chemicals should be stored tightly sealed in the original containers with original labels.
Store chemicals by class. For example, keep combustible products away from flammable products.
Also, separate chemicals with different purposes. For instance, store herbicides away from insecticides and do the same with fungicides.
Remember to keep chemicals out of direct sunlight. It's also important to avoid temperature extremes, especially with liquid chemicals because freezing temperatures can reduce their effectiveness.
Most dry formulations are less sensitive to low temperatures than the liquids.
Store chemicals in a cool, dry, well-ventilated location, preferably with an inward-slanting concrete floor. Putting chemicals on pallets or shelves reduces moisture accumulation that might lead to a spill from disintegrated bags or rusted cans.