Mammoth P is the product you need to maximize phosphorus cycling. Boosting your phosphorus cycling can increase growth and yield! Plus, we ensure that every Mammoth product delivers huge benefits.



Why Mammoth P?


How Mammoth P Can Improve Your Plants


Application & Specifications




Maximized Phosphorus

Keep internodes shorter and focus energy on plant growth.

Beneficial Bacteria

The bacteria in Mammoth P acts like tiny bioreactors that continually release phosphorus, without the need for a separate additive – allowing you to carry on worry free.

Protects Your Rhizosphere

The science in Mammoth P outcompetes potentially harmful pathogenic microbes, shielding your plant’s rhizosphere.

Safe for All Media and Fully Compatible

Mammoth P is safe for use as a supplement to any fertilizer program in soil, soilless, and hydroponic systems.


The technology in Mammoth P has been extensively tested by growers and farmers across the world. We have worked with leading US academic institutions and independent labs who have proven that Mammoth P can deliver increased growth.


You’ve Seen the Benefits, but How Does it Work?


We developed Mammoth P by screening billions of soil microorganisms in search of those that most efficiently release phosphorus and make it available to plants. Our proprietary trait selection platform assembled a consortium of soil bacteria that are 30x more effective at phosphorus cycling than naturally occurring microbial communities! More phosphorus can provide greater growth.

Not your average microbe.


Phosphorus Cycling Process

We put a strong focus on phosphorus cycling processes to ensure the release of soil P and micronutrients – improving phosphorus availability for your plants.

High-Throughput Platform

Our platform allows us to select soil microorganisms at the community level in hydroponic environments. What does that mean for you? A consortium of bacteria that work equally well in soil, soilless, and hydroponic systems.

Directed Phenotyping

Other products use a non-directed approach to phenotyping. With Mammoth P, you know you’re getting a handpicked, highly effective product with proven provenance and functionality.


We take no shortcuts. Before releasing a product, we perform extensive tests in the lab, greenhouse, and field to ensure each product meets our stringent efficacy standards.

Eliminate the need for enzyme additives. 

Enzyme Structure

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


Keep reading for details on usage, application, specifications, and more.



Mammoth P contains microbial nutrition that is extremely effective in boosting the growth of your plants. This is because the beneficial bacteria in Mammoth P are able to cycle more phosphorus in the plant-root system.


We’ve carefully selected and cultivated microbes and phosphorus nutrients that thrive in hydro environments.


The microbes in Mammoth P are very effective at mineralizing the slow-release phosphorus that’s found in many ‘all-in-one’ water-only soils.


Mammoth P is offered in a range of volumes to fit every need.
For best results, follow our simple recommended application rates noted below.


  • View our Material Safety Data Sheet

Application Rate

Per Week

  • US (mL/GALLON)……….0.6
  • EU (mL/LITER)…………..0.16


Directions for Use

  • Shake bottle well before each use
  • Mix with water following the weekly application rate

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.

Product may not be registered in all states.

MAMMOTH P Registration Map


What are the main benefits of running Mammoth P?
Mammoth P is a bloom booster and a bio-stimulant. Mammoth P microbes directly and specifically target phosphorus to cycle and increase its bioavailability. Increasing the plant’s access to Phosphorus is hugely important because Phosphorus is a macronutrient that needs to be “unlocked” for plant uptake; it plays a large part in plant growth, especially with flower development. Growers using Mammoth P typically see an increase in yield somewhere between 10-20%. Implementing Mammoth P also helps plants function to their full genetic potential. Mammoth P is truly a yield & quality booster.
Is Mammoth P organic?
Yes; Mammoth P is fully organic. It is OMRI-listed and Clean Green Certified.
I already use a microbial product, how is Mammoth P different from what I’m already using?
Mammoth P is unique and different from other microbial products because it specifically targets Phosphorus to increase its plant bioavailability. Mammoth P can be used as a standalone microbial product in a feeding schedule OR alongside other microbial & beneficial products – they will play well together. Mammoth P is highly concentrated, very cost effective to use throughout all growth stages, and provides a huge return on investment (ROI) for growers.
Is Mammoth® P a liquid or dry product?
Mammoth P is a liquid product.
What is the shelf life of Mammoth P? / When does it expire?
Each Mammoth P bottle should be unsealed before its expiration date. After removing the seal, growers have a 1-year time frame in which the contents of the bottle or jug should be used. Check the date on the bottle by looking near the UPC.
How should I store Mammoth P?
Always store in original packaging in a dry place, away from direct sunlight. Keep tightly closed when not in use. Avoid storage in a humid environment or above 95°F (35°C) or below 32°F (0°C). Keep out of reach of children and pets, and away from food and drinking water.
How can I measure Mammoth P?
Measure small amounts of Mammoth P with a pipette, syringe, or small measuring cup. If measuring larger amounts, use a larger measuring cup or graduated cylinder.
Our 250mL, 500mL, and 1000mL bottles have a self-contained measuring area so you can squeeze the bottle to get your desired measurement of Mammoth P and then pour it into a mixing container or reservoir.
How often do I apply Mammoth P?
Applying Mammoth P twice per week is optimal. Once per week is great, but twice per week is even better.
What is the recommended application method & rate for Mammoth P?
Apply Mammoth P to the root zone (rhizosphere): 0.6mL per gallon, twice per week.
Can I use Mammoth P on my seedlings/clones/cuttings?

Absolutely, we highly recommend using Mammoth P on seedlings, clones, and cuttings. Mammoth P works very well in aeroponic cloning machines and when watered into Mammoth Starter Plug trays. When using Mammoth P on seedlings and clones, expect to see early and robust root development.

Can I add Mammoth P to a nutrient mix? If so, when?

Mammoth P can be added alongside nutrients and additives in a tank or reservoir mixture. We recommend adding Mammoth P last in your mixing schedule. As your plants adjust, you may find that you can alter/scale back on the frequency and quantity of application of your nutrient regimen (particularly the Phosphorus input).

What is the pH of Mammoth P?

Mammoth P sits at a near-neutral pH in its concentrated form within each bottle. Mammoth P should not affect the pH of your water and/or nutrient solution because such a little amount is added, per volume.

Can I apply Mammoth P as a foliar?

We do not recommend this.

Can I use Mammoth P alongside other Mammoth products?
With Mammoth CannControl – Yes, as a root zone/soil drench. We recommend adding Mammoth P after CannControl has been mixed into solution in a tank/reservoir.
Mammoth Silica – Yes, as a root zone/soil drench. We recommend mixing Mammoth Si into a tank/reservoir first, then adding Mammoth P as the final step in the mixing process.
Mammoth Starter Plugs – Yes, it’s a great idea to dose our starter plugs with Mammoth P. Doing so will introduce our microbes into the root zone of seedlings or cuttings.
Mammoth Myco – Yes, it’s a potent combo to help establish robust roots early in a plant’s life.
Mammoth Grow Me – Yes, the earthworm castings tea mixes well with Mammoth P microbes to form a potent combination.
Are there any products I shouldn’t run alongside Mammoth P?

Mammoth P is effective alongside most any other product. Products that are designed to sterilize should be staggered away from Mammoth P applications, if possible.

What is the purpose of the alfalfa extract ingredient in Mammoth P?

We use alfalfa in our product because we wanted an organic, natural, sustainable media to grow microbes in. Alfalfa has a low Carbon to Nitrogen ratio, so it works as an excellent food source for Mammoth P microbes.

Do I use Mammoth P in flowering cycle and flush with it?

Yes. Plants always need Phosphorus, but especially in the flowering stage. Mammoth P microbes highly increase the bioavailability of Phosphorus to the plant which is critical during the flowering stage. We recommend flushing with Mammoth P to ensure a very clean finish for the plant.

Is it normal for sediment to appear in a bottle of Mammoth P?

It is completely normal and standard to see sediment accumulation and “bio-lipids” in the bottle. Be sure to shake the bottle well before using.

My bottle of Mammoth P froze – is it still OK to use?

Our R&D team has run tests on frozen/thawed Mammoth P and found that freezing does not compromise the product’s efficacy. You can use your Mammoth P as usual, and rest assured that it will work just the same. However, because of the uncertainties around freezing/thawing product – we will replace any frozen product received per our 100% satisfaction guarantee.

Does Mammoth contain triacontanol? Will this affect my grow?

Mammoth P does contain a very small trace amount of triacontanol. Mammoth P is produced using a diluted alfalfa tea, therefore there may be unquantifiable trace amounts of triacontanol.

Can I use Mammoth P alongside a P-K booster product?

Yes, they work well together as long as neither product is overused. Our microbes release bound Phosphorus, so they could be releasing a large amount if there is a lot of bound Phosphorus in the growth media. If too much Phosphorus is unlocked, plants could show symptoms of burning – if that happens, we recommend scaling back either the amount of P-K booster being used, or the amount of Mammoth P being used, or both – this will help prevent the release of too much Phosphorus.