Milorganite Long Lasting All Purpose Lawn Food 6-4-0 Fertilizer 32 lbs is good for promoting healthy growth of lawns trees shrubs and flowers. The non-burning slow-release nitrogen feeds up to 10-weeks and the iron delivers a long-lasting green. The slow-release formula helps reduce mowing conserve water and is non-leaching. Trust the fertilizer that has been proven effective for over 90-years. Fertilizer contains slow release nitrogen which helps produce thick Green lawns without excessive top growth. Milorganite contains iron for enhanced greening. The non-burning formula does not contain any salts. Milorganite Stays in the soil ready to work when moisture comes later.