News

Van der Knaap Group resumes coco production

The past few months the outbreak of Covid-19 virus led to Van der Knaap production locations in Sri Lanka, India and the Dominican Republic remaining closed till further notice. We can now inform you that production at the Growrite production sites has been resumed. Good news for our customers but also for our employees worldwide who can get back to work again.
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Out now: the latest Grow-How!

The latest edition of our newsletter Grow-How! is now available. In this edition we inform you about the sustainable cultivation system that allows organic cultivation apart from the soil. Van der Knaap Group developed a bioreactor that converts proteins into nitrate nitrogen. The tests that were carried out with the organic nutrient solution in our own test center "de Kas" are also discussed. Read the latest edition of the Grow-How! here.
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Compact cultivation of kalanchoe without the use of Tilt

Van der Knaap has researched compact cultivation of kalanchoe in collaboration with the growers of Blos5. Blos5 is a cooperative of kalanchoe growers who work together in the areas of purchase, sales, marketing and cultivation. The research focused on compact cultivation without the use of Tilt. In practice, this chemical growth regulator is most often used to keep the leaves of the kalanchoe compact. In this trial the researchers investigated other strategies, such as the possibilities of substrate and adapted fertilisation, to keep the plant compact.
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Weed control with TopControl

Weed control in pot and container cultivation is a challenge for many growers. Due to the limited application possibilities of pesticides, a lot of time must be spent on weeding weeds and moss during cultivation and delivery work.
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Satisfied students after using Forteco Power in All Climate Greenhouse

The first educational project in the All Climate Greenhouse in the World Horti Center has been successfully completed. Students of the MBO Westland have grown cherry tomatoes in this high-tech greenhouse from September 2019 up to and including January 2020. During this project, students received advice and support from companies, including the Van der Knaap Group.
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New Holland Potgrond mixing line ready

In recent months, Holland Potgrond Poeldijk has been working tirelessly on the installation of a new mixing line. The existing loading line has been replaced by a new, fully equipped mixing line. In doing so, Holland Potgrond has invested in expanding their capacity and improving continuity and quality.
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Influence of substrate on shelf life of Phalaenopsis

Earlier this year, the Post-Harvest Knowledge Centre of FloraHolland in Naaldwijk conducted a trial to investigate how the use of different substrates affects the shelf life of Phalaenopsis.
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Van der Knaap rises in the Hillenraad100

Last Friday the Hillenraad100 was announced during the annual HortiGala, which took place in the Ridderzaal (The Hague) this year. The list consists of the 100 leading companies in the Dutch horticultural sector. Van der Knaap Group finished number 28 this year. An increase of no less than 29 places compared to the previous edition!
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Update on Holland Potgrond Poeldijk renovations

Renovations at Holland Potgrond in Poeldijk are in full swing. The existing loading line for potting soil mixtures is being replaced by a new, fully equipped mixing line
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New state-of-art propagation plugs with Ellepot paper

Van der Knaap has entered a strategic collaboration with Ellepot, the leader of the integrated paper pot system Ellepot. Together we introduce a new state-of-the art propagation plug, which will be produced with the patented air press technology developed by Ellepot.
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