Bonsai Soil Trace Elements (Frit) - Essential Elements and Minerals for Bonsai Tree Health FRIT contains over 28 vital trace elements and minerals that are essential to the health of your bonsai. This slow acting granular compound will gently release all the major and minor trace elements over a 12 month period Provides everything missing in a bonsai fertilizer Apply Frit Trace Elements once per year. Add about 1 teaspoon per gallon of water for fast acting insertion of trace elements when you water.