A good amendment to stretch out a limited supply of organic materials is Canadian spaghnum peat moss. A rich brown in color, it has a light, soft, fibrous, spongy texture. It is a clean, natural, and organic substance that is free of harmful salts, chemicals, or weed seeds. A plant product, it is biodegradable.
For valuable information about peat moss and how to use it in the landscape go to Yardener's Helper, click here.
Hoffman A H Inc/Good Earth 10Qt Sphagnum Peat Moss Specialty Soil & Conditioner
10 QT, Sphagnum Peat Moss, Premium Grade Of Coarse Canadian Peat Moss, When Mixed With Soil, Increases The Soil 's Capacity To Hold Water & Nutrients, Can Be Blended With Perlite & Vermiculite When Custom Soilless Potting Mi x Is Desired.