FREE SHIPPING! MAMMOTH® P is an organically derived microbial inoculant for growing plants that maximizes phosphorus and micronutrient cycling to maximize bud growth, increase yield, and enhance plant health. MAMMOTH P was developed by Growcentia’s founders at Colorado State University using next-generation technology. MAMMOTH P has been tested extensively by Colorado growers and independent labs have proven that it increases growth. All production is done at MAMMOTH P’s facility in Fort Collins Colorado to maintain the highest level of quality control. This beneficial bacterial formula works great in soil, soilless, and hydroponic systems. Using MAMMOTH P in hydroponic systems is an excellent way to introduce the organic benefits of soil microbial nutrient cycling without sacrificing water quality. MAMMOTH P was engineered to supplement any fertilizer program. MAMMOTH beneficial bacteria act like micro bioreactors, continually producing enzymes that release nutrients. More Phosphorus Increased levels of phosphorus keep internodes shorter and focuses energy on bud production. Safe For All Media Safe for use in soil, soilless, and hydroponic systems. Protects Rhizosphere Shields the plant rhizosphere by outcompeting potentially harmful pathogenic microbes.