Peat/bark-based growing medium

PRO-MIX® BK AGTIV® AMPLIFY™ is a medium-weight growing medium designed for the cultivation of greenhouse horticultural crops in 4” pots or larger. The combination of processed pine bark, Sphagnum peat moss and perlite makes it a general-purpose product that provides good drainage and a medium water retention capacity. PRO-MIX® BK AGTIV® AMPLIFY™ contains Bacillus, a bacterium that stimulates plant growth, and mycorrhizae, a beneficial endomycorrhizal fungus that supports plant root systems.


  • 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
  • Produces more vigorous and healthy plants
  • Accelerates seed germination and plant establishment
  • Encourages healthy plant root systems
  • Enhances nutrient and water uptake 

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

AGTIV® AMPLIFY™ technology promotes an amplified root system, better nutrient and water uptake, which increases plant productivity.

  • Amplifies root system
  • Improves nutrient and water uptake
  • Increases plant strength and productivity

Physical Properties

Particle Size: 

Air Porosity: 

Water Holding Capacity: 

Bulk Density: 

Code Size Units per pallet Weight
5028725RG 2.8 cu ft Loose 48 45 - 60 lb
5060725RG 60 cu ft Comp. 2 900 - 1250 lb
"Been with PRO-MIX® 53+ years. It’s the best product on the market. Visited their facility in Rivière-du-Loup and it was a clean operation. Very happy with products they make."

Jim Brohl
Brohl’s Greenhouse, Macomb, MI

Read their story

"PRO-MIX® is not only great for the grower, but also is an easy and ideal growing medium for the customer! 5 stars"

Matt McClain
Buchwalter greenhouse


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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.

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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.

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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.

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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.

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