Organic fertilizers release nutrients as they break down, improving the soil and its ability to hold water and nutrients. Given time, they make your soil and plants healthier and hardier.Organic and conventional fertilizers are safe for lawns and the environment as long as they are used properly. The process of how plants absorb nutrients is the same whether they come from an organic or inorganic fertilizer, so, from the grasses’ perspective, it doesn’t really matter which type of fertilizer you use.