Does Fertilizer Expire? Storage Tips for Longevity

Fertilizer comes in liquid and dry forms. Liquids (suspensions/solutions) may settle — shake before use if stored a couple seasons. Prevent freezing.

Granular or water-soluble crystals must stay dry — not just from rain/snow, but humidity. High humidity cakes granules into solid blocks. Kept dry, they store indefinitely. Keep in original container for identification. If opened, wrap tightly in plastic to exclude moisture.