Phosphate/ˈfɑːsfeɪt/ Definition 1 of 3Pro Tip 1/3Fertilizer Use Phosphate enhances plant growth, hence its use in agriculture. The garden's vibrant blooms are thanks to the phosphate-rich fertilizer. Pro Tip 2/3Common Presence Phosphate is widely found in everyday items beyond fertilizer. Phosphate additives improve shelf-life in some processed foods. Pro Tip 3/3Environmental Concern Excessive use can pollute, making environmental impacts a discussion point. The lake's algal bloom was linked to phosphate runoff from farms.