Rootshield Plus is a preventative control of major root diseases for a length of 3 months with just one application. It contains the active ingredients Trichoderma harzianum strain T-22 and Trichoderma virens strain G-41, which grow on the roots of plants inhibiting and attacking root-damaging fungi pathogens so plants can grow uninterrupted by the harmful effects of diseases. Provides a huge cost savings by reducing or eliminating chemical fungicide applications. Storage requirement is refrigeration for up to 10 months, or room temperature of 70-75 degrees F for 6 months. Rate of application is 3-8 oz per 100 gallons of water (1-2 tbs per 5 gallons) as a soil drench. Cannot ship to AK, ND, and NV.