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ProMix HP Mycorrhizae 3.8 CU/FT

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HP - high porosity

With its high perlite content, PRO-MIX HP provides a great growing environment to growers looking for a significant drainage capacity, increased air porosity and lower water retention.

The added benefit of fibrous peat moss and coarse perlite makes this formulation ideal for growers who require a superior-quality product adapted to their needs for watering flexibility and crop seasonality.


  • Dries out more frequently than general purpose, peat‑based mixes
  • Well suited for low-light growing conditions and high humidity
  • Less difficult to overwater crops
  • Reduces incidence of water related problems (root diseases, algae and fungus gnats)
  • Holds less water for improved leaching of fertilizer salts during crop cycle


  •     Improves fertilizer uptake; reduces fertilizer costs
  •     Increases the resistanceof plant to stresses; reduces maintenance costs
  •     Optimizes results without changing growing practices


  • Annuals
  • Foliage plants
  • Potted flowering plants
  • Greenhouse vegetables
  • Young plant propagation
  • Vegetable transplants
  • Indoor gardening

Advice from our specialist

Whether you require low moisture retention or prefer a high percentage of perlite, PRO-MIX HP is the choice of many growers for specialty crops, like poinsettias and flowering potted plants, or rooting cuttings.

PRO-MIX HP provides the highest air porosity of all of the PRO-MIX blends with good moisture retention.

During the winter months, many growers use this blend because of the low light intensity and short day length.



  • SPHAGNUM PEAT MOSS (65-75%) 

    Canadian Sphagnum peat moss is a natural, organic matter that comes from a peat bog.

    This primary resource is carefully harvested by vacuum harvesters.

    Peat moss comes in various fibrosity and levels of decomposition.

    Once carefully graded, peat moss assures that qualities of each grade are optimized for based on grower and uses for a final product reaching high quality requirements.


    Perlite is an alumino-silicate ore of volcanic origin.

    The raw ore is crushed, graded and screened in various particle sizes.

    Perlite has a high total-porosity and improves drainage and air porosity.


    Used to adjust pH to optimum range.

    Also a source of Calcium and Magnesium.



    A wetting agent is a substance that reduces the surface tension of water, allowing water to penetrate and uniformly wet growing media.


    Mycorrhizae - GHA297 Technology is a Biological Growth Enhancer that increases the yield of flower, fruit and vegetable plants by extending the root system to acquire the most of available nutrients in the soil. Mycorrhizae also improve resistance to root diseases and stresses.