Ensuring the correct amount of the right nutrients is not an easy task. Common practice is to use straight fertilizers. For smaller surfaces, straight fertilizers are not always practical. We offer an alternative with our NPK fertilizers which are fine-tuned to match the needs of substrate cultures.

Excess or shortage of plant nutrients often results into production and quality losses. Grogreen Subtil offers a convenient and foolproof solution to fertilize substrate grown crops.


Download the DRY-TEC NPK Brochure


Subtil SolaSubtil Curbi
Nitrogen (N), total7.49.4
Nitrate Nitrogen (N-NO3)7.28.7
Ammonium Nitrogen (N-NH4)0.20.7
Phosphorus Pentoxide (P2O5), soluble in water11.011.1
Potassium Oxide (K2O), soluble in water37.035.4
Magnesium Oxide (MgO), soluble in water3.03.2
Boron (B), soluble in water0.0320.04
Copper(Cu), EDTA-chelated, soluble in water0.0070.008
Iron (Fe), EDTA-chelated, soluble in water0.1870.19
Manganese (Mn), EDTA-chelated, soluble in water0.0820.085
Molybdenum(Mo), soluble in water0.0060.008
Zinc (Zn), EDTA-chelated, soluble in water0.0320.035

screen-shot-2016-10-07-at-15-46-15Advantages of Subtil

Grogreen Subtil formulations exist for a wide variety of water qualities and growth stages without deviating from optimal nutrient solutions. Both with surface and well water, Subtil fertilization matches pH and nutrient proportion thanks to its flexible and well considered concept.

Our products range is based on the latest balanced and efficient nutrient solutions for substrate grown crops.

Preparing the stock solution is easy and simple. You can reduce significantly the chances of making mistakes. The chelates included in Grogreen Subtil provide a pH stability of up to 7.5

You can apply our product using several fertilizer dosage systems, starting from a simple tank with a volumetric dosage pump up to full automatic AB-units.