plagron promix


Fertilise at your own insight

Plagron Promix is a mix of the very best, carefully selected types of peat. The addition of various types of fibre results in a lightness and oxygen level found only in Plagron quality substrates. No nutrients have been added to Promix, only Plagron worm castings. The worm castings stimulate the growth of soil organisms and activate the organic fertilisers which have to be added as from the first day. This makes Promix the perfect potting soil to fertilise organically according to your own judgement and choices. The result is a 100% organic yield. Promix produces the highest yields when used with Plagron Alga Grow, Alga Bloom and the additives from Plagron.

The advantages of Promix
  • No added nutrients.
  • Fine structure for high water absorption capacity.
  • Rapid rooting through low EC value.
  • Usage

    Start fertilising  the first day with for example Alga Grow.


    Peat, worm castings.
    pH (H2O) 6.5 - 7.9 
    EC (mS/cm) 0.5 - 0.8


    Promix is available in 50 litre bag.
    Tips from Plagron
  • Download the 100% NATURAL Grow Schedule for the best use and the correct dosages.
  • Promix does not contain any nutrients.
  • Do you want to compose your own feeding schedule for your plants? Go to the Grow Schedule Calculator.
  • [EN - missing] Heb je hulp nodig bij het samenstellen van je Grow Schedule? Gebruik dan deze handige tool waarmee je online makkelijk zelf je persoonlijke Grow Schedule kunt berekenen.
    Frequently asked questions about Promix
    Yes, technically this is possible. However, the airiness of Promix will make it difficult for the seeds or cutlings to absorb moisture. Therefore they will not develop as well and less quickly. The fibers in Promix also may hinder the seeds when they are growing out of the soil. Therefore you should rather use our Seeding & Cutting soil.
    Yes, this is possible. But the mixtures are actually too airy to ensure a good start for the plants.
    According to the 100% NATURAL Grow Style you don't have to regulate the pH value when you combine Promix with Alga Grow and Alga Bloom.
    You should start adding nutrition from the first day. More information can be found on our Grow Schedule which you can download here.
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