Fertilizer Restrictions by County

The Southwest Florida Water Management District (District) does not have fertilizer restrictions, but many counties and municipalities do. Check with your local government to learn if there are mandatory fertilizer restrictions or few the list below. A fertilizer blackout is a time when using fertilizers containing nitrogen and phosphorus are prohibited, usually during the rainy season. Heavy rain can wash fertilizers, especially granular ones, from lawns to streets, eventually reaching local water bodies. This runoff may harm ecosystems by increasing nutrients like nitrogen and phosphorus in the water. Excess nitrate levels in water can be harmful to aquatic insects, amphibians and fish. If algae have an unlimited source of nitrates, excess growth may occur. Large amounts of algae growth can cause reduced water clarity and extreme fluctuations in dissolved oxygen, which is stressful to aquatic life.

Here are the Florida counties within the District with fertilizer restrictions: