Soil Plant Enhancer (SPE-120) contains Beauveria bassiana, a natural symbiotic fungus that grows with your plants. SPE uses this natural fungi to defend roots, stems, and leaves from pathogens and insects. Apply the full rate the first year and you only need to apply half the rate the following years because you're just boosting the plants- A great investment to ensure plant protection! Available in a dry or a liquid format.