This potting soil is constructed of a blend of decomposed pine and fir needles, decomposed oak leaves, and clay soil from decomposed granite. This mixture is made of ingredients that are as close to the soil that is naturally occurring in the ancient groves that we can reproduce outside of the groves. One bag of this potting mix contains 3 quarts. Priority Mail is the only shipping choice available with a direct order from the website. This item can be shipped by Priority Flat Rate to save money. Please call us if you prefer Flat Rate shipping for this item at (559) 349-0081.