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K-OPTI is a direct available potassium foliar fertilizer.

Problems with potassium uptake are often related to the pH value of the soil. A high pH inhibits potassium uptake by the roots. And in drought conditions, potassium is not released into the soil, which prevents it from being absorbed. Foliar fertilization using K-OPTI offers a solution by supplying this important nutrient to the crop.


K-OPTI contains a pH-neutral, very readily available form of potassium. Crops benefit from a supplement of potassium at cold soil temperatures, during drought conditions and at the end of the growing cycle when the crop is bulking tubers, bulbs, grains and fruits. K-OPTI has been specially developed to supply (arable) crops with sufficient potassium through a foliar application in periods with a high potassium demand.



•Better potassium absorption in dry conditions.

•Improves the drought resistance of the crop.

•Contains a high concentration of directly available potassium.

•Much more effective than adding potassium fertilizers via the soil.

•Boosts the yield and size of bulbs, tubers, grains.

•Improves quality and storage life.



Nitrogen (N) as urea40 g/L

Potassium (K2O) - 350 g/L

Foliar application (maximum concentration 1:50).

Potatoes, onions: 5 L/ha.

Apply 3 x when the tubers or bulbs are starting to swell.


Fruit trees: 3L/ha.

Apply 5 x from fruit set up to 3 weeks before picking.


Rapeseed: 2-3 L/ha. 1-2 Applications per year around flowering / before harvest.


Grain crops:2-3 L/ha1-2 Applications per year around flowering / before harvest.


Peas and beans:2-3 L/ha. 1-2 Applications per year around flowering / before harvest.


Other crops:5 L/ha. Apply 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. Crystallization 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.

•Do not spray if copper hydroxide residue is present on the plant.

•Never mix pure products together.

•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.


Package sizes

1L, 5L, 10L, 20L, 200L, 1000L

Data sheets

Refer to specimen label and safety data sheet for more information about this product.

Please contact us for further details.

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