Look for a local farm or feed store. and buy in bulk to save the most money. I been overpaying for so many thing and i recently went to one and got some good deals. i normally pay for 3.8 cubic foot bale of peat but at this supply store it was . Also 40 pound bags of lime 40 pound bags of gypsum . Also Pearlie or vermiculite for for 4 cubic feet. i just ordered some stuff from a store called garden elements in California. free shipping to east coast i got 40 pound bags of "down to earth" fish bone meal and Alfalfa meal . and a bag 2 cubic foot bag of rice hulls for . That's in the United States and they don't ship outside us currently but. some of that stuff like the fish bone meal and gypsum i was pay like for a 5 pound bag not in bulk. just do some digging around online and you will find what you need at a good price.