Quality and certification

Our RHP quality: reliability from substrate to harvest

Every successful crop starts with reliability. No surprises, no inconsistencies — just a substrate that performs exactly as it should. Dutch Plantin delivers that reliability. With every shipment. In every season.
That’s not just an ambition, but a promise: we provide RHP quality you can build on.

Our coconut substrates form the foundation for thousands of crops worldwide — not because we shout the loudest, but because we deliver what truly matters: consistent, measurable, and verifiable quality.
And that doesn’t happen by chance — we control the entire production process from A to Z.

Full control over quality and delivery reliability

Whether it’s vegetables, soft fruit, flowers, or plants, our customers all have one goal: strong crops and optimal yields. That’s why we leave nothing to chance:

Our own factories in India and the Netherlands
Full control over production and logistics
Coconut sourced from verified regions
At least 14 quality checks per batch

This way, we maintain full control over both quality and delivery reliability.

“EVERYTHING CAN ALWAYS BE IMPROVED!
FORTUNATELY, THE DRIVE TO PIONEER IS IN OUR DNA.”

Balanced nutrients — even in the long term

Our growbags, blocks, and briquettes are designed for stable cultivation, even under extreme conditions.
Thanks to our innovative buffering process:

We reduce sodium and potassium levels
We add calcium on request
The water–air ratio remains stable for years
The substrate retains its structure, even after intensive use

What does RHP quality mean?

As an RHP-certified producer, we meet the strictest standards in the substrate industry:

Consistent physical structure
Stable EC and pH values
Free from pathogens and harmful substances
Fully traceable production
Independent quality inspections

For you as a grower, that means predictability, peace of mind, and maximum control over your cultivation.

Growbags with RHP certification

Our RHP-certified growbags are specially designed for high-tech greenhouse cultivation and are ideal for tomatoes, cucumbers, and strawberries.
Request a sample and experience the consistent performance of our substrates yourself.

Advice and support

At Dutch Plantin, our commitment doesn’t end with delivery.
Our professional horticultural advisors support you from planting to harvest:

Personal on-site advice
Support for growers, potting soil companies, and distributors
Practical guidance for optimal substrate use

Experience the difference of RHP quality

Would you like to know what our RHP-certified coconut substrates can mean for your cultivation?
Get in touch with us for more information or request a free sample.