Bio-Sustain™ contains PGPR, but what are they? Plant Growth Promoting Rhizobacteria (PGPR) are a group of bacteria that colonize roots or rhizosphere soil and are referred to as plant growth promoting rhizobacteria (PGPR). Microorganisms found in the rhizosphere are able to produce substances that regulate plant growth and development. These microbes have direct mechanisms that … Continue reading Bio-Sustain – PGPR