Grotek Black Pearl


Grotek Black Pearl is more than just high-quality charcoal. It is ladened with high-grade ingredients like biochar, volcanic rock dust, low molecular weight humates, and kelp. The harmony between ingredients in the soil provide a dramatic boost to crops when added to any nutrient program.


Grotek Black Pearl

Grotek Black Pearl was the first product added to the Grotek Green Line! In 2009, Grotek brought biochar into our industry as a means to improve soil quality. Continued research is the reason we increased the level of Biochar in our formula (60% by weight). The evidence is clear – when used as part of a soil and nutrient management program, Biochar can create optimal conditions to increase plant growth while improving overall soil quality and supporting beneficial microbes in the rhizosphere.

Thousands of years ago, activated charcoal was discovered to improve crop productivity by enhancing soil quality. Applying modern technology to a time-honoured practice has produced a premium biochar for supercharging soil and soilless media. Carefully selected ingredients support beneficial soil biology, and improve nutrient cycling and moisture holding capacity.

Black Pearl is more than just high-quality Biochar. It is highly charged with quality organic inputs such as volcanic rock dust, kelp, and low molecular weight humates. The synergy between ingredients in the soil provides a dramatic boost to crops when added to any nutrient program.

Not all Biochar is created equal, and making Biochar isn’t as easy as starting a fire and scooping ash and charcoal into your containers. The Biochar in Black Pearl is virgin wood fiber that is harvested from sustainably managed forests and designed through an engineered pyrolytic process (low oxygen combustion). It is a considered a Class 1 product by the International Biochar Initiative, and has an exceptional surface area of over 700m2/g. Black Pearl is a perfect addition to any nutrient program to help support plant growth by focusing on soil quality and supporting root development.

How to Use:

Black Pearl can be used as a top dress, but will be more effective when incorporated into the medium/soil. This formula contains soluble and insoluble inputs and is not meant for re-circulating water culture

  • For media mixing, work 2 tbsp (25 ml) per Quart (1 L) into the soil blend
  • For transplants, dust 3 tbsp (45 ml) directly under the roots and work lightly into soil
  • Water thoroughly and then place plant into transplant hole. .
Derived From:

Biochar, volcanic ash deposit, kelp, low molecular weight humates.

Guaranteed Minimum Analysis:

Soluble Potash (K₂O ………. 1.0%

Calcium (Ca) ………. 1.0%

Approved for organic agriculture by Ecocert Canada/Approuvé pour l’agriculture biologique par Ecocert Canada. Learn more about Grotek’s Black Pearl. Want to browse our wide selection of amazing Grotek products? Click here to view all Grotek products.

Additional information

Weight N/A
Dimensions N/A
Sustainability Features

Organic, ORMI Listed

Nutrient Type

Base Nutrient

Nutrient Application

Soil / Promix

Liquid Format

10 L, 17 L, 4 L, 900ml

Bulk Quantity



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