Get a greener lawn faster with C-I-L Iron+ lawn fertilizer. This specially formulated C-I-L fertilizer provides visible greening results in just 72 hours. It contains 10 times more iron to quickly produce a deeper green form of chlorophyll and 20% slow-release nitrogen to keep your lawn green longer. Worried about damage to your patio or deck? Don't be. This lawn fertilizer has a non-staining formula that protects hard surfaces. The 18-0-8 formula of this C-I-L fertilizer provides a consistent long-term release of nutrients over an area of up to 4300 square feet.