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With almost 30 years of experience and very extensive knowlede, Tom de Haas supports customers in all areas of fertilisation and manure. He also gives complete advice on substrate and pre-treatment for pot plants, vegetables and cut flowers.  

Together with the customer, Tom looks for the best solution to a problem, starting with the search for the source. With his broad knowledge and experience in the field of fertilisers, Tom is able to give personal advice. He understands what the customer wants and always thinks along to find the best solution that best meets the customer's needs.  

Tom knows what is going on in the sector and what is important to the customer. He has a lot of experience in advising growers in the field of feeding schedules, preparing manure trays and recognising deficiency and excess symptoms in crops. Tom also offers support in making soil and water analyses. 

If you have questions about fertilisers, please contact Tom de Haas via the contact form. 

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

Roger de Jagher
With more than 30 years of experience and extensive knowledge in the field of shading and coating materials, Roger is happy to advise on which coating or shading product is most suitable for a grower and the crop.

Han van der Kooij
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.

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.