Choose from our selection of Mammoth P Microbes Plant Bloom Booster Products to help you maximize media growth and increase yields. Mammoth P Microbes products were formulated by microbiologist from Growcentia looking to promote sustainable agriculture and improve soil health. Mammoth P Microbes Plant Bloom Boosters improveMammoth P Microbes Plant Bloom Boosters improve plant nutrient availability when added to the soil around your plant. This enhances plant health while keeping any negative impacts on the environment to a minimum. HTG Supply offers a wide range of products from all of the top brands.