The term nutrients means not only a balance of Nitrogen, Phosphorus and Potassium (N-P-K), but also the secondary and trace elements required by all plants. These include calcium, magnesium, sulphur, iron, zinc, copper, cobalt, boron and others. Some nutrients are available in soil, but most should be added to insure adequate supply for vigorous growth. In order for them to work properly, the soil must be in a receptive condition - light in texture with good moisture and air supply. Mushroom mix is the remnants from a mushroom grower cut with horse manure to insure heat for continued composting. It is the richest mix In The Garden makes.
