wheat ears at flowering stage


BlueN™ provides a unique way to enable plants to capture nitrogen throughout the season.

BlueN is a nutrient efficiency biostimulant containing a natural bacteria, Methylobacterium symbioticum, that fixes nitrogen from the air and converts it into ammonium inside the plant.


BlueN provides a sustainable, supplemental source of nitrogen that reduces dependency of nitrogen uptake from the soil and ensures the plant has access to nitrogen all season long.


For more info call our Technical hotline: 0800 689 8899, e-mail: ukhotline@corteva.com or submit an enquiry here

About BlueN

BlueN offers a unique way to facilitate plants to capture nitrogen thoughought the season. 

BlueN is a foliar applied biostimulant composed of an exclusive strain of naturally occurring endophytic bacteria, Methylobacterium symbioticum. This bacterium uses methanol given off by the plant during metabolic processes as an energy source to fix atmospheric nitrogen and convert it to ammonium inside the plant. Ammonium is used to make essential amino acids essential for plant growth.


When applied, BlueN enters the plant though the stomata. BlueN concentrates mainly in areas of growth in and around plant leaf cells. Broadly BlueN will take about 1 week to colonise a plant and will fix the equivalent to 3kg/ha of applied nitrogen per week thereafter usually about 30kg/ha per season (10-week crop). Therefore, once colonised, BlueN provides the plant with a sustinable supplimental souce of nitrogen thoughout the season.


Technical Hotline

Contact Us

For more info call our technical hotline: 0800 689 8899, or e-mail: ukhotline@corteva.com


Enhanced plant growth and resilience


BlueN enhances plant growth and resilience by producing a constant flow of nitrogen directly inside the plant, to the plant. This process occurs thoughout the growing season. 

Easy to use

Easy to use

BlueN is simple to store and apply with a shelf life of two years. We reccomend that you use BlueN on the day of opening. Read more on our application advice here.

Provides a sustinable source of nitrogen

Provides a sustinable source of nitrogen

Increasing nitrogen fertiliser does not necessariy result in more nitrogen becoming avilable to the plant; nitrogen fertiliser is subject to loss and is not always avilable when your crop needs it.

BlueN provides a supplementary and sustinable source of nitrogen, without the risk of leaching or releasing additional greenhouse gases. Not only does BlueN reduce the dependency of nitrogen fertiliser uptake from the soil, BlueN ensures that the plant has access to nitrogen all season long. 


BlueN nutrient efficiency biostimulant is an effective solution for a range of crops. BlueN is intended for foliar application on authorised crops when at least 50% of the ground is covered by the crop. See the label for specific crops.



Apply BlueN to a range of arable crops. To see the full list, download the BlueN label here


Horticultural crops

Apply BlueN to a range of horticultural crops. To see the full list, download the BlueN label here

Technical Specifications





Rates 333 g/ha
Water Volumes 100-400 L/ha depending on crop type
Water Quality Do not apply BlueN with chlorinated products with a content of chlorine >2ppm. Use with water pH between 5 - 8

Applying BlueN


How to get the best from BlueN

BlueN feed primarly off methanol produced by the plant during active metabolism. Therefore, BlueN should be applied to actively growing plants


BlueN's bacterium, Methylobacterium symbioticum, enters via stomata. As a result, the greatest benefits are obtained when BlueN is applied to the foliar of a non-stressed crop when stomata are opened. Apply BlueN in the morning or late afternoon/evening.


If temperatres are too cool, BlueN colonisation can be slowed down, and if too hot, the bacterium can die. The optimum day temperature for application is between 10°C - 30°C (ideally 15°C - 25°C).


Apply BlueN when crop has sufficient plant biomass, usually when the crop cover is 50%, and when the crop presents good soil coverage. 


Use water with a pH between 5 and 8.


The shelf life of BlueN is two years unopened. We reccomended to use BlueN on the day of opening because the bacteria become activated once in contact with moisture. The shelf life of an opened pack can be up to one month, however this is difficult to achieve. 


Apply BlueN at a rate of 333 g/ha. Rates below 333 g/ha do not deliver 3 x 107 CFU/g – the number required to produce a viable colonisation and expected biostimulation effects.


For more information, read the BlueN label here.


Useful tools and resources

Application advice

Application advice

Applying BlueN in optimum conditions is key for effective colonisation of the plants, and therefore, to get the best results. This tech sheet will help you get the best from BlueN.

Technical Hotline

Contact Us

For more info call our technical hotline: 0800 689 8899, or e-mail: ukhotline@corteva.com

BlueN Trial Results: Potatoes

BlueN Trial Results: Potatoes

BlueN provides a potato crop with a unique way to capture nitrogen throughout the season, helping plants reach their yield potential.

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