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Optima Leaf-Cu+ is a liquid foliar fertiliser based on copper that has been 100% complexed with hepta gluconic acid (HGA). Copper strengthens cells and has a positive effect on sugar and starch production.

Optima Leaf+ Range

Optima Leaf-Cu+ is part of the Optima Leaf range, a line of foliar fertilisers that are efficiently absorbed by the crop. The '+' stands for the presence of supplement trace elements. These prevent one-sided fertilisation and demonstrably increase the effectiveness of the product.

Functions of copper

  • Essential in the seed and fruit formation stage.
  • Essential for chlorophyll formation and photosynthesis.
  • Important for strong, flexible plant cells.
  • Positive influence on the starch content, sugar content and flavour of fruit.

Possible causes of copper deficiency in plants

  • Low copper levels in the soil.
  • Soils with a high organic matter content fix copper which reduces its availability for the crops.
  • Too much phosphate and nitrogen in the soil prevent the copper uptake in the crop.
  • A high soil pH reduces the availability of copper.


  • Delivers copper in an organically complexed form.
  • Ensures efficient uptake and translocation of copper.
  • Enrichi aux oligo-éléments.
  • Product toegelaten in de biologische land- en tuinbouw conform de reglementen : EU 2018-848 & EU 2021-1165 .

Copper (Cu) water soluble

45 g/kg

Iron (Fe) water soluble3 g/kg
Manganese (Mn) water soluble1 g/kg
Boron (B) water soluble0,3 g/kg
Zinc (Zn) water soluble0,25 g/kg
Molybdenum (Mo) water soluble0,1 g/kg

Complexed Cu, Fe, Mn, Zn

100 %

Stability range pH

3,0 - 12,0

Specific gravity


pH product

7,5 - 8,5


Dark green liquid



Available in 17.5 litre containers.

EC Fertiliser

Application rates

Foliar application (maximum concentration 1:200, unless stated otherwise)

Arable crops:
1.5 litres per hectare.
2-5 per year, during leaf development.

Tree nursery, vineyards, (small) fruits:
1.5 litres per hectare.
4-6 per year, during leaf development.

Lawn and pasture:
1.5 litres per hectare.
1-2 per year, during leaf development.

Forestry and plant nursery:
1.5 litres per hectare.
4-6 per year, during leaf development.

Ornamental crops:
1.5 litres per hectare.
4-6 per year, during leaf development.

Vegetables and strawberries:
1.5 litres per hectare.
2-6 per year, during leaf development.

Fertigation application:
Standard dosage all crops:
2.0 litres per hectare, every 2 weeks, as required.

Instructions for use
  • Shake or stir well before use
  • Store in a cool dry place away from direct sunlight. This product has been tested and can be stored safely at temperatures from 5°C to 25°C. Crystallisation and/or sedimentation may occur below 5°C.
  • Apply under suitable spraying conditions (e.g. temperature, humidity, wind speed). Do not treat if the temperature is >25°C or if it might rise to >25°C in the hours after application. Preferably perform the treatment at the end of the day. Do not apply product close to harvesting.
  • Miscibility and/or efficacy cannot be guaranteed when combined with any other agent. Before mixing, it is recommended to perform a test on a small scale.
  • Do not mix with other products in pure, undiluted form. Product is stable at pH 3.0 - 12.0. In combination with products containing phosphate, always test for combinability first.
  • We recommend carrying out a trial application on a small area first, before applying to the entire plot.
  • The shelf life of the product is stated on the label. As long as the guidelines for storage are followed the expiry date (BB) on the label is guaranteed.
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210127 JP Optima Leaf Cujcn Soiltech


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