Natural fertilizers help to preserve soil fertility which provides nutrient uptake for your plants and also nourish the valuable microbes in the soil that keep it healthy. One of the products that work nicely in this regard is called ProtoGrow based Natural fertilizer. Its ingredients are a unique blend of the micronutrients from a very special kelp extract and the macronutrients from North Atlantic fish. It retains moisture in the soil and help to prevent disease.