Vidi Fol (Fortafol)

Active ingredient:
Fulvic acid in herbal extract
Product category:
  • Water-soluble biostimulant

  • Approved for use in organic cultivation

  • Water-soluble biostimulant

  • Approved for use in organic cultivation

Use for

Use for

Use Vidi Fol to stimulate growth and strengthen the crop.


All crops.

How it works

How it works

Mode of action

Fulvic acids improve permeability the of cell membranes, leading to better transport of nutrients. This results in higher photosynthesis and better growth.

Product specifications

Product specifications

Pack size 1 and 5 litre containers.
Presentation Liquid with strong mint scent.
Content 1% fulvic acid in herbal extract.
Directions for use

Directions for use


Foliar application:

  • Shake container well before use
  • Fill the application tank with half the required amount of water
  • Add the correct amount of Vidi Fol to the water
  • Mix thoroughly
  • Fill the tank with the remaining amount of water
  • The pH of the solution should be between 5 and 7
  • Spray immediately after preparation

Application via irrigation systems:

  • Dissolve the required amount of Vidi Fol in the appropriate amount of water for the device that is used
  • The pH of the solution should be between 5 and 7


Can be applied with standard spraying or drenching equipment.

Application as drench or via irrigation system:

  • A separate tank/container is recommended for the proper preparation and application of the product
  • Always add Vidi Fol to the irrigation water after the sand filter, ideally directly injected at the irrigation valve by means of an injection pump (e.g. Dosatron) or venturi
  • Avoid drainage in substrates when applying by drench/drip to prevent leaching
  • Make sure Vidi Fol (Fortafol) does not remain in the irrigation system during the night
  • Use disinfectants regularly to keep the irrigation system clean, but do not use Vidi Fol at the same time as the disinfectant

Application via spraying:

  • Always ensure that the spray tank is clean
  • Ensure good crop coverage


  • The dosage of Vidi Fol depends on crop, growth substrate and climate and should always be adjusted to the particular situation
  • Start application preventively soon after planting of the crop
  • Application rates typically range from 0.5-3 litres/ha
  • Applications should be repeated a number of times
  • Consult a Koppert advisor or a recognized distributor of Koppert products for advise on the best strategy for your situation


  • Do not mix Vidi Fol with products containing calcium to avoid precipitation
  • Do not mix Vidi Fol with systemic pesticides
  • An increased uptake of pesticide compounds can cause damage to plants
  • Do not tankmix with beneficial microbes

Environmental conditions

  • The pH of the solution should be between pH 5-7.
  • Young plants can be sensitive. Test the sensitivity of the plants on a small scale, prior to full treatment.
  • Do not mix Fortafol with products containing calcium and avoid mixing the product with pesticides. An increased uptake of these compounds can cause damage to plants.


  • In some countries the product is sold under the old name Fortafol
  • Vidi Fol can cause damage to young plants. Test the sensitivity of the plants on a small scale, prior to full treatment
Product handling

Product handling

Storage time after receipt

  • See package for expiry date.
  • Storage time is strongly reduced once the package has been opened.

Storage temperature


Storage conditions

  • In a cool dark place
  • Avoid direct sunlight
  • Protect against freezing

Safety and precautions

The concentrated product causes serious eye damage and is toxic to aquatic life with long lasting effects.

"The general conditions of Koppert (Koppert B.V. and/or of its affiliated companies) apply. Only use products that are permitted in your country/state and crop. Always comply with the conditions specified in local product registrations. Koppert cannot be held liable for unauthorized use. Koppert is not liable for any loss of quality if the product is stored for longer than recommended and/or under incorrect conditions."