Tribus is a microbial inoculant built around beneficial Bacillus species. It is designed to support plant growth, root function, nutrient cycling, and overall crop performance.

We sell Tribus because Bacillus species are among the most practical and durable microbial tools in agriculture. They are resilient, broadly useful, and well-suited to integration into grower programs.

Tribus supports crops through multiple microbial functions, including root-zone activity, nutrient availability, rhizosphere support, and plant-growth-promoting effects.

Growers need microbial tools that are easy to use and consistent in real systems. Tribus helps bring beneficial biology into the root zone in a practical, field-ready way.

CFU stands for Colony Forming Unit, which basically translates to live microorganisms–in this case, live microorganisms in each milliliter of Tribus. Our Tribus Original is 10 Billion CFU/mL, meaning at least 10,000,000,000 bacteria in each mL of Tribus liquid will start growing and reproducing on plant roots.

Tribus can be used in soil-based, soilless, and hydroponic systems. So regardless of whether you grow in peat, coco, rockwool, deep water culture, or in the field, Tribus can be used in your system.

Tribus can be used with both conventional and organic nutrients. We like to say it’s universally applicable, meaning it works in virtually any nutrient program.

Tribus can be applied as a root drench or directly to the leaves as a foliar application. Tribus is designed to be mixed into irrigation water and applied to the soil or hydroponic system. Mix it into a nutrient reservoir like you would a typical nutrient

You should apply Tribus as soon as your seeds or clones develop roots and continue applying all the way up until the day of harvest.

We recommend different rates based on your environment and inputs, but the general rule of thumb is to apply Tribus at a rate of 1 mL / gallon of water or nutrient solution 1x a week or as frequently as every watering.