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Han is product specialist fertilisers and pre-treatment agents. He specialises in solid and liquid fertilisers and trace elements and offers complete advice on all fertiliser issues and can calculate feeding schedules. He understands what growers want and thinks with them in order to reach the best solution together. He also suggests which products to use in cases of shortages and visible signs of deficiency. 

Han has over 30 years of experience in the horticultural sector so he knows what is happening in the sector and what is important to the grower. Before Han worked at Royal Brinkman he had his own flower nursery. Thanks to his experience, he can help customers in all areas within his specialisation. 

Han is clear to customers and committed to achieving the best results and making improvements. His approach is straightforward, professional and solution-oriented. If you have questions about fertilisation Han is always ready to help and can be contacted via the contact form. 

Can’t find your answer? Fill out the contact form and Han van der Kooij will reach out to you. On week days, you will receive a response within 24 hours.

Jaap Lubbersen
Jaap is internal product specialist for crop care for Royal Brinkman and the person to contact if you need advice on fertilisers. An important focus of his specialisation is solid and liquid fertilisers, trace elements, pre-treatment agents and water treatment.

Tom de Haas
With almost 30 years of experience and very extensive knowlede, Tom de Haas supports customers in all areas of fertilisation and manure.

Maarten Casteleijn
An important focus of his specialisation is plant physiology and products to improve plant resilience. He likes to give complete and personalised advice on the possibilities of growing resilient crops with the aim of reducing the use of chemicals.