“Organic gardeners use fertilizers like seasonings. They add the finishing touch that brings out the very best in plants” – Rodale’s all new Encylcopedia of Organic Gardening
Chemical fertilizers feed the plant and not the soil. In time the soil becomes more and more stripped of organic matter requiring more and more chemical fertilizers. Organic fertilizers feed the soil as well as the plant providing a food source for soil micororganisms and earth worms that condition the soil bringing in oxygen and other needed nutrients. When buying organic fertilizers, don’t always trust that it doesn’t contain chemical fertilizers. Read the labels. Be wary of products labeled organic that have an NPK ratio that adds up to more than 15. NPK stands for Nitrogen, Phosphorus, and Potassium.
Here is a list of Substances High in either NPK or other balancing minerals like calcium and magnesium
Blood meal, Coffee grounds, Cottonseed meal, Fish emulsion, Fish meal, Comfrey, Soybean meal, seaweed
Bonemeal, Colloidal phosphate, rock phosphate, comfrey, alfalfa,
Granite meal, Greensand, Kelp meal, wood ashes (yes, throw ashes in the compost), comfrey, seaweed, yarrow(believed to increase disease resistance)
Balancers ( calcium, and or magnesium) Balancers affect the pH of the soil
Eggshells (c), Epsom salts (m), Gypsum (c), Limestone (c,m), Limestone (c)