SFG step 2 soil

more from SFG website
SOIL – Fill frame with Mel’s Mix, a mixture of 1/3 compost, 1/3 peat moss, and 1/3 coarse vermiculite (no dirt needed). A blended compost made from many ingredients provides all the nutrients the plants require (no chemical fertilizers needed). Peat moss and vermiculite help hold moisture and keep the soil loose. It’s best to make your own compost from many ingredients but if you have to buy it, make sure it is truly compost. Some stores sell mulch or humus and other ground covers but call it compost. Most commercial compost is made from one or two ingredients so to be safe, don’t buy all of one kind but one of each kind until you have enough for your garden. It’s really best to make your own compost, then you know what goes in it. When buying vermiculite, be sure to get the coarse grade, and get the more economical 4 cubic foot size bags. If placing frames over grass you can dig out the grass or cover it with cardboard or landscape cloth to discourage grass and weeds from coming up through your new garden soil.