The Benefits

MAMMOTH P is the first organically derived microbial inoculant for growing plants that maximizes phosphorus and micronutrient cycling to maximize bud growth, increase yield, and enhance plant health.

University Developed

Developed by Growcentia’s founders at a leading US university using next-generation technology. Extensively tested by Colorado growers, and proven to increase plant growth by independent labs.

Beneficial Bacteria

Our beneficial bacteria act like micro bioreactors, continually producing enzymes that release nutrients. Reduces the need for a separate enzyme additive.

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.

Fully Compatible

Use as a supplement to any plant fertilizer program.

Effectiveness Data

Lab Tests

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 to increase plant growth. All production is done at our 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 nutrients without sacrificing water quality. MAMMOTH P was engineered to supplement any fertilizer program.


Increase Trimmed Sellable Yield

Dry flower per plant (grams)


Increase Stem Strength

Density (grams)

Out-Growing the Competition

MAMMOTH P is differentiated from competitors’ products in several ways
grow bigger buds

Our development platform focuses on nutrient cycling processes to release soil P and micronutrients from bound forms, thus improving nutrient availability to plants.


Our high-throughput platform allows us to select soil microorganisms at the community level in hydroponic environments – which enables these bacteria to work equally well in soil, soilless, and recirculating hydroponic systems.


Our directed microbial phenotyping platform – coupled with cutting-edge high-throughput molecular techniques – is highly effective. Many competitor products use a non-directed approach by simply mixing microbes, which results in a microbial concoction of unknown provenance or functionality.

Enzyme Structure

MAMMOTH P vs. The Competition

Our bacteria act as micro-bioreactors, constantly producing a more diverse suite of enzymes that enhance nutrient availability than the leading enzyme-specific products.

microbial nutrients
Cannabis Nutrients
how to grow bigger buds
What Growers are Saying
Soil to Hydro to Coco

Effective in All Media


MAMMOTH P contains microbial nutrition that occurs naturally in soil bacteria, making it extremely effective for growing plants. The beneficial bacteria in MAMMOTH P are able to naturally cycle more phosphorus and other micro-nutrients in the plant-root system, thus enhancing release of the nutrients for plant uptake.

How we did it: We grew hundreds of different microbial communities from natural soils collected across the USA. Using our next generation phenotyping platform, we selectively bred microbes at the community level for their ability to cycle phosphorus. After propagating thousands of successive generations, a climax community was reached which was capable of cycling phosphorus at over 30x higher levels than we observed from microbes in natural soils.


MAMMOTH P is effective in hydroponic systems due to the careful selection and cultivation of microbes and hydroponic nutrients that thrive in a hydro environment.

How we did it: We selectively bred the soil microbial communities for their ability to cycle phosphorus using deep well microplates which mimicked hydroponic reservoirs (i.e. aqueous solutions with concentrated nutrients). A climax microbial community was realized after propagating thousands of generations which could cycle phosphorus over 30x higher levels and thrive in an aqueous, high nutrient, hydroponic environment.

Super Soil

MAMMOTH P primarily helps mobilize mineral and organic phosphates to promote healthy plant growth and improve plant yield. These microbes are very effective at mineralizing slow release fertilizers found in many ‘all in one’ water only soils, such as super soil and recycled soils. Because we selectively bred this microbial community to actively cycle nutrients at up to 30x greater levels than how they functioned in nature, in some cases these microbes may be too powerful to use across the entire bloom growth stage. We encourage you to use MAMMOTH P sparingly until you have more experience using the microbial nutrients product in your super soil system.

Application Chart

The Fine Print

Directions for use 1. Shake bottle well before each use. 2. Mix with water following the application rate table. FOR BEST RESULTS, USE WITHIN 6 MONTHS OF PURCHASE.

General Use / Purpose of product MAMMOTH P is specifically designed to increase phosphorus availability during the bloom phase, and should be used as a supplement to your regular fertilization program. Application during clone and vegetative phase will boost effectiveness. MAMMOTH P has a near neutral pH formulation and runs clean in any system.

Guaranteed Analysis: Soil amending nonplant food ingredients: Active Ingredients
Bacteria Culture


Other Ingredients
Alfalfa Extract




Also contains nonplant food ingredients: CFU/mL
Pseudomonas putida


Comamonas testosteroni


Citrobacter freundii


Enterobacter cloacae




Mammoth_Family_Front (2)
Mammoth P Is A Concentrated Inoculant

5 Gallon | Mammoth P Treats: 31,450 gallons of water

1000ml | Mammoth P Treats: 1600 gallons of water

250ml | Mammoth P Treats: 400 gallons of water

1 Gallon | Mammoth P Treats: 6480 gallons of water

500ml | Mammoth P Treats: 800 gallons of water

120ml | Mammoth P Treats: 200 gallons of water

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