Home & Garden Garden The First Amendments By Matt Hickman Writer Emerson College The New School Matt Hickman is an associate editor at The Architect’s Newspaper. His writing has been featured in Curbed, Apartment Therapy, URBAN-X, and more. our editorial process Matt Hickman Updated May 20, 2020 Skip the fertilizers next time you set up a garden. (Photo: Bachkova Natalia/Shutterstock) Share Twitter Pinterest Email Home & Garden Planting Guides Indoor Gardening Urban Farms Insects I’m not going to even pretend that I know a whole lot about the use of organic soil amendments in gardening, but here’s what I do know: Organic soil amendments take the place of common synthetic fertilizers — Americans spend an estimated $5 billion a year on the chem-leaking stuff — in adding beneficial nutrients and minerals into soil, preventing erosion, and helping soil retain water. The end result? A naturally healthy garden free of fossil fuel-based-chems. Organic soil amendments come in all shapes and sizes — compost, animal manure, plant-based manure, mulch, lime and animal waste products like blood meal and fish meal — and often serve specific purposes. Since I don’t know my acidic from my alkaline nor do I have the NPK (nitrogen, phosphorus, potassium) nutrient ratio committed to heart, below are some helpful resources and a video from dreadlocked gardening authority Tracy DiSabato-Aust to fill you in on the specifics (“not all poo is created equal”) before you go sprinkling bat guano on your garden. Organic soil amendments — This easy-to-follow, 1-2-3 guide covers the various organic soil amendments and their benefits. Written by Massachusetts-based, greenthumbed guru Lynn Jones. The Dirt Doctor — "Acceptable Organic Soil Amendments and Fertilizers" The dirt on what types of soil amendments are free of potentially toxic chemicals and safe to use in garden, as recommended by the Texas Organic Research Center.