Due to such strong demand, American Agritech has added Hydroplex Soil Formula to the Botanicare line. Since clay colloidal particles bind up phosphorus in soil gardening, it is necessary to double or even triple phosphorus levels. In addition, soil microbes often compete for phosphorus which makes it even more imperative to increase phosphorus levels when growing in soil. Many Botanicare soil growers will love the high level of phosphorous the 0 - 12 - 8 formula provides.