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Aurin Where to buy

Plant food, made from urine.

Aurin is a liquid fertiliser for flowers and vegetables, recovered from separately collected urine. The first of its kind with full market authorisation in Switzerland, France, Liechtenstein and Austria.

Where to buy

A bottle of Aurin fertiliser lying on a lawn

Shop with our distributors

In Europe, Aurin is sold by Vuna, in 500 ml bottles and 5 to 20 litre canisters.

Shop on vuna.ch

What's in the bottle

Composition, % by weight
Total nitrogen (N)4.2
Potassium oxide (K2O)1.8
Phosphate (P2O5)0.4
Boron0.0015
Zinc0.0012
Iron0.0001

Also magnesium, calcium, copper, manganese and molybdenum in low concentrations. All nutrients are in a form plants take up easily. No heavy metals.

How to use it

10 ml in 1 litre of water

Dilute with water to suit the crop and water your plants once or twice a month. Aurin also works as a foliar fertiliser, and keeps indefinitely in a sealed container.

Authorised in
Switzerland & Liechtenstein2018
Austria2022
France2024

Yes, it started in a toilet.

  1. Collect

    Waterless urinals and urine-diverting toilets collect urine separately.

  2. Convert

    A biological process stabilises the nitrogen through nitrification.

  3. Clean

    An activated carbon filter removes residues of medicines and hormones.

  4. Evaporate

    Distillation eliminates pathogens and concentrates the nutrients into Aurin, plus distilled water for reuse.

See how the treatment works

Grown by professionals

  • Grün Stadt ZürichSports turf
  • City of GrazTree planting substrate
  • City nurseries of Lausanne and WinterthurSeedlings
  • Domaine de la Jasse, CombaillauxVineyards
  • Geneva school of agricultureLettuce, cardoon and more
  • Palmeraie des Alpes, GrenobleVarious plant species

Tested in trials by INRA Paris, Humboldt University Berlin, the Ithaka Institute, ETH Zurich, EPFL, ZHAW and others.