Revive (bring life to) your potting soil! Our ProBiotics cultivate healthy, living soils with a specially crafted blend of 19 beneficial microbes including mycorrhizal fungi. Plants rely on symbiotic microbes to access the water and nutrients they need from the soil. Without these soil-dwelling organisms most plants will never reach their full potential. All in a convenient tablet form with no foul odor, no messy dust, and no measuring or mixing. Just add to water and feed, that's it!