Botanicare has specially formulated Pure Blend Pro Soil for plants cultivated in soil and for the final ripening of fruit in the last stage of hydroponic gardening.
Cultivating fruiting and flowering plants in hydroponics requires less phosphorus levels than potassium and even nitrogen. In hydroponics, phosphorus levels that are too high tend to lock out calcium, magnesium and trace minerals.
On the other hand, plants grown in soil need higher phosphorus levels due to clay colloidal particles that bind up phosphorus. Microbes in the soil also compete for the phosphorus. When cultivating fruiting and flowering plants in soil, growers usually need to double or triple phosphorus levels, unlike hydroponics, thus making the 1.5-4-5 formula in Pure Blend Pro Bloom Soil ideal for soil applications.