Peat/bark-based growing medium

Former name: PRO-MIX® BK25 / PRO-MIX® BRK20

PRO-MIX® BK is a medium-weight growing medium designed for the cultivation of horticultural crops in 4” pots or larger. The combination of processed pine bark, Sphagnum peat moss and perlite makes for a general-purpose growing medium with good drainage and medium water retention.

*Available in bulk in Eastern United States.


  • Good drainage, medium water retention
  • Suitable for a wide variety of greenhouse crops
  • High bulk density ensures good pot stability
  • Unlike other bark-based mixes, growers can use fertilizer regimes similar to peat-based mixes

More from the PRO-MIX® BK family


Recommended Usages

Ornemental Ornamental

Foliage plants
Plug and germination
Potted flowering plants


Inert ingredients

  • Sphagnum Peat Moss (60-70%)
  • Processed Pine Bark (20-25%)
  • Perlite
  • Calcitic and dolomitic limestone
  • Wetting Agent

Physical Properties

Particle Size: 

Air Porosity: 

Water Holding Capacity: 

Bulk Density: 

Code Size * Units per pallet Weight
5028025RG 2.8 cu ft Loose 48 45 - 60 lb
5060025RG 60 cu ft Comp. 2 900 - 1250 lb

* Regional availability may vary


Logo Veriflora

Veriflora Responsibly Managed Peatlands

Premier Tech’s peat moss comes from bogs that are certified under the Veriflora Program. This certification ensures the application of good management principles in all aspects of sustainable development. The criteria include environmental assessment, social engagement, and product quality.

Download certificate

Premier Tech, the Company Behind the Brand

Experts at your Service

Our dedicated team of experts is committed to ensuring that professional growers maximize the potential of PRO-MIX® products. We offer comprehensive support to help you enhance your expertise and achieve optimal results in your cultivation endeavors.

Learn more

Premier Tech Growers and Consumers Unmatched consistency
Premier Tech Growers and Consumers Superior quality

Superior Quality

We meticulously choose each element of our products, from the carriers to the biological active ingredients, and all other components in between. Our rigorous quality control spans from the bio fermenters to the final formulated products, ensuring every aspect meets our high standards. This meticulous attention to detail offers you peace of mind, knowing you're receiving only the finest quality products.

Unmatched Consistency

Our beneficial microorganisms are seamlessly integrated into our growing media. We meticulously verify the viability and efficacy of each batch produced, guaranteeing that your chosen product maintains its quality and delivers consistent results every time.

Ask for a demo

Expert service

Frequently Asked Questions

We do not recommend reusing any growing medium. There are many good reasons not to reuse, including changes to chemical and physical properties over time, diminished effect of wetting agent after use and/or transmission of root diseases to newly planted crops.

Haven't found the answer to your question?
We are here to help you!

Contact us

Similar Products