Introduction
The Van der Knaap Group is a Dutch family company with production facilities all over the world. We develop sustainable, high-quality products and services in partnership with our customers.
Substrates
Custom substrates
Custom-made
Tailored to customers’ growing requirements
For different cultivations and applications
We mainly use natural raw materials, such as coco and peat for our potting soil mixtures. Both are of natural origin; organic and recyclable. This gives them their environmentally friendly nature. Other raw materials such as perlite, clay, sand and bark can be added to a potting soil mixture.
We work with RHP-certified raw materials. RHP certification guarantees that the substrate meets the right quality requirements for aspects such as water and air content, pH and EC.
Coco peat: Coco peat is made from the husk of the coconut.
Peat: Peat can be roughly divided into two types: white and black peat.
Custom-made: Not all potting soil mixtures are suitable for all crops.
Growing Soilutions
More than twenty different substrates
Suitable for different crops and applications
High-quality products
The Growing Soilutions product range consists of over twenty substrates that are suitable for different crops and applications. As well as a number of peat-free mixtures, there are solutions for multiplication, the cultivation of orchids, vegetables, soft fruit, potted plants, bedding plants and cut flowers.
Paperpots are uniform plugs with a paper cover that the roots can penetrate. Paperpots are commonly filled with specially developed paperpot mixes: KCT Peat or KCT Coco Peat. They can also be filled with a customer specific mix of finely sieved peat, finely sieved coco peat and/or perlite. Paperpots are suitable for all types of cuttings and virtually any crop. They are easily sortable and can be automatically processed.
Specifications
Good air/water management
Different potting soil mixtures available
Available in different types of trays
Cutting holes available on request
Available sizes
Paperpots are available in diameters ranging from 13 to 80 mm and heights between 30 and 70 mm.
Paperpots
Suitable for the rooting of all types of cuttings
Available in various sizes
Good air/water management
Obturo®
Obturo® is made according to customer specification
Excellent rooting properties
Suitable for virtually all crops
Obturo® plugs can be tailored completely to customer requirements. As the size, tray, cutting holes and potting soil mixture can be adjusted in consultation, Obturo® offers all the flexibility needed to perfect the cultivation process. Obturo® has been specifically developed to facilitate easy rooting. The plants' roots will very quickly penetrate the entire plug, ensuring the best growing results.
The unique composition of the mixture combined with a binder makes it easy to rewet the Obturo®. Obturo® plugs can be processed directly by hand, but the plugs are also extremely suitable for automatic handling.
Specifications
Tailor-made plugs
Good rooting
Excellent air-water ratio
Applicable in the plug-in-plug system
Suitable for automatic handling
OK Biobased® (four star rating)
Applications
Suitable for almost any crop, even acidophilic plants
