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Fertilizer for hydroponics

Special fertilizers are required for hydroponics

In hydroponics - opposite to soil cultivation - the plant gets everything it needs for growing directly to the roots by the nutrients dissolved in the water. Unlike conventional methods, nutrients do not have to be removed from the soil by watering. This also saves the plant a lot of energy, as it has easier access to the nutrients.

To ensure that the nutrients in soil-free cultivation can be absorbed by the plants directly from the water, special hydroponic fertilizers are available for hydroponic cultivation.

What does a plant need?

Plants require additional nutrients for growth, like dissolved minerals and trace elements. Plants absorb the nutrients through their roots when they are dissolved in the water as ions. In hydroponic fertilizers, all essential ingredients must be contained in the fertilizer, since nothing can be additionally extracted from soil.

Macro elements - are needed in larger quantities

Nitrogen N, potassium K and phosphorus P

Secondary nutrients - important but needed in smaller quantities

Calcium Ca, Magnesium Mg and Sulfur S

Micronutrients - Traces, important for enzyme reactions

Iron Fe, copper Cu, zinc Zn, manganese Mn, boron B, molybdenum Mo, chlorine Cl, silicon Si - to name the most important

Why a hydroponics fertilizer?

Hydroponics fertilizer is ...

...a fertilizer specially developed for the cultivation of plants in water, which only enables effective cultivation without soil. A good hydroponic fertilizer is characterized by the fact that it contains all nutrients and trace elements necessary for healthy growth in a directly usable form.

What hydroponic fertilizers are available?

There are mineral fertilizers and organic fertilizers

which are available in solid or liquid form, as single-component fertilisers or multicomponent fertilisers.

What is a hydroponic mineral fertilizer?

With mineral fertilizers, or inorganic fertilizers, the nutrients consist of mineral salts. They are obtained from natural raw materials through processing and the composition is precisely adjusted.

Mineral fertilizers for hydroponic applications contain everything that plants need. The nutrients are available in a way that they can be absorbed and processed directly by the plants.

A relatively large amount of energy and resources are consumed in the production of mineral fertilizers. In order to produce sustainable fertilizers, many fertilizer manufacturers now rely on the use of renewable energies and easily recyclable packaging materials.

What is an organic hydroponics fertilizer?

The nutrients in organic fertilizers originate from plants or animals and are called natural fertilizers. Meanwhile there are also organic bio fertilizers or vegan fertilizers for hydroponics.

The nutrients in organic fertilizers are not all directly available for the plants to absorb, but must first be partially converted by microorganisms such as EM (Effective Microorganisms) so that they can be processed by the plants.

If low expenditure and high yields are desired, organic fertilizers are not so optimally suitable.

Properties of hydroponics mineral fertilizer:

  • synthetic production
  • easy to handle
  • saves water, since the nutrient solution only rarely needs to be changed
  • accurately dosable
  • the fertiliser content can be easily measured via the conductivity measurement (EC value)
  • fast and effective supply of the plants
  • suitable for all hydroponic systems

    Properties of organic hydroponics fertilizer:

    • obtained from natural resources
    • more complex in application, since the nutrients still have to be partially decomposed (microorganisms)
    • higher water consumption, as the nutrient solution has to be changed frequently due to deposits and odour formation
    • control of the amount of nutrients by conductivity measurement (EC value) not meaningful
    • slower plant growth
    • not optimal, only suitable for a few hydroponic systems

      Single or multicomponent fertilisers are available

      Hydroponics single component fertilizer

      Hydroponics single component fertilizers contain everything a plant needs for growth and are generally well suited for green plants, such as salads and herbs.

      Hydroponics multi-component fertilizer

      With hydroponic multi-component fertilizers, it is possible to respond more specifically to the various growth cycles of the plant and to provide the plant with an optimum supply, especially in the flowering and fruiting phase. Here you will find the terms "Grow" or "Vega" for the vegetative phase and "Bloom" or "Flores" for the flowering and fruit phase. So-called additives "Boost" or PK 13-14 (phosphorus and potassium components) can also be added, e.g. in order to further improve the flowering and fruit formation.  

      for example:

      Bionova Aero Supermix
      = Single component complete fertilizer. It can be supplemented with PK 13-14 during the flowering phase.

      Canna Aqua – Vega + Flores
      = Two-component fertilizer. Vega (A+B) is used in the growth phase, Flora (A+B) in the flowering phase.

      T.A. TriPart (GHE FloraSeries)
      = Three component fertilizer. All 3 components are always added, in different doses depending on the growth phase.

      How do I use a hydroponic fertilizer?

      Our recommendations are addressed to urban hydroponics hobby gardeners who want to achieve good yields with little effort.Together with water, the hydroponic fertilizer forms the nutrient solution that supplies the plants. Therefore the water quality also plays an important role. In the professional sector, tap water is specially treated in order to have complete control during cultivation. In our opinion it is sufficient to use tap water for hydroponic urban gardening.


      • Select mineral hydroponic fertilizer (follow instructions for use and safety measures)
      • Shake bottle well before each use
      • Fill nutrient solution container with water
      • Add hydroponic fertilizer according to the manufacturer's dosage instructions. Stir well
      • In case of multi-component fertilizers, add the next component and stir
        Important: NEVER mix the different components together beforehand!
      • Check the EC value (fertiliser content, electrical conductivity).
      • Add fertiliser until the desired EC value is reached - guide value EC 1000 - 2000 µs/cm.
        Caution: Too much fertiliser can stress the plant!
      • If necessary, adjust the pH value using pH- or pH+ liquid
      • Some fertilizers are pH-stable, so that the pH value does not need to be readjusted frequently.
      • A pH adjustment is important if the pH drops below 5.2 or rises above 6.5.
      • Since the composition of the nutrient solution is shifted by plant growth or different nutrient uptake, it may be necessary to replace the nutrient solution from time to time.

        Our experiences with hydroponics fertilizers are …

        that mineral fertilizers are best suited not only for beginners in hydroponics. They are easy to use, the fertilizer content is easy to dose and the cleaning effort is very low. We have had very good experience with the Canna Aqua series and with Bionova Aero Supermix.