Dissolving Fertilizer Powder

  • Use only absolutely clean glass or plastic bottles made as germ-free as possible (e.g. by scalding out with boiling water), in order to avoid premature spoiling of the solution.
  • Reverse osmosis water is good for dissolving the fertilizer; the usual demineralised water available in the trade is of course just as suitable. If no other water is available, tap water can be used if it is not too hard.
  • Put the powder into a sufficiently large bottle. Small amounts of the powder remaining in the package or the funnel can be rinsed into the bottle with a little water.
  • Do not use less water than advised, as otherwise not all the powder will dissolve. The only reason for not diluting the fertilizer further is that we can then no longer guarantee long-term durability of the solution.
    If greater dilution is required (e.g. for certain dosage pumps), then we advise diluting only part of the solution shortly beforehand each time it is used.
  • The powder will dissolve most quickly if very hot water (~ 80 °C) is poured on, the bottle is closed and then strongly shaken several times. Over the next few hours, shake the bottle from time to time. After a day, the fertilizer should be ready for use. This will also work using cold water, but then it will take rather longer until the fertilizer is completely dissolved.
  • If there is a tiny remnant of undissolved matter, this can be ignored, as it will not alter the effect of the fertilizer.
  • Do not breathe in the powder dust and make sure the powder does not come in contact with the eyes or the mucous membranes. Also avoid contact with the skin for longer periods.
    If the above should have happened by accident, rinse with clear water for some time and if necessary consult a doctor. Take the label of the fertilizer package with you.
  • The required fertilizer powder quantities can be found in the respective article descriptions (select the suitable size first).
Dissolving Fertilizer Powder


To make a stable, non-caking or perishable refill powder, it is necessary in some cases to use different chemicals for ready-made solutions (however, the specified and guaranteed active agents are always contained in the same quantities).

The pH value of the self-made solutions may therefore be slightly different, and the solutions hardly had time to absorb oxygen from the environment, for example, when freshly mixed.

For this reason, the solutions freshly made from the refill powders are at first very light in colour, but they darken slightly over time, even if they do not usually become as dark as the ready-made solutions we offer.