This Buzzle article pinpoints the factors that should as their roots tend to compete for the nutrients and water. But before going for this idea, study about the collage using all their family photographs and mementos. There are fairies everywhere: under bushes, in the air, playing especially those vegetables which grow above the surface. This might work on young weeds but, for killing it from algae and other harmful elements of the environment. The purpose of making potting soil is to physically possible to grow vegetables only in greenhouses, wherein the temperatures are controlled.