What Are RHP and OMRI Certifications?
The most critical standards determining substrate quality
We examine why substrates used in professional horticulture must be certified and how these certifications affect production performance.
Success in commercial plant production cannot be achieved through irrigation and fertilization alone. The quality of the growing medium used is one of the most critical factors directly determining production performance.
However, many substrate products available on the market produce different results even though they look the same.
The main reason for this difference: a lack of standards
At this point, two key quality indicators come into play:the RHP (
) and OMRI certifications
Why Is Substrate Quality Inconsistent?
Many manufacturers face this problem:
The same irrigation schedule is followed
The same fertilizer is used
However, different results are obtained
The reason for this is often the substrate used:
Lack of homogeneity
Unstable pH and EC levels
Variable water-holding capacity
This also leads to a loss of control over production.
What Is an RHP Certificate?
RHP is an international certification system that ensures the quality and consistency of substrates and growing media.
This certificate:
Ensures physical integrity
Standardizes water-holding capacity
Ensures that pH and EC levels remain stable
Ensures consistency across products
In other words, it ensures that you get the same result every time you use it.
What Is an OMRI Certification?
OMRI (Organic Materials Review Institute) is a certification that verifies whether products comply with organic farming standards.
This certificate:
Indicates that the chemical content has been checked
It is compatible with organic production systems
Supports safe and sustainable production
This is of critical importance, particularly for producers engaged in organic farming or those aiming to export.
The Risks of Using Uncertified Substrates
Yield fluctuations
Irregular root development
Imbalance in nutrient intake
Loss of control during production
The most critical point:
Even if you use the same system, the results will vary
What Does Certified Substrate Offer?
Stable production
Predictable results
Healthier root development
Higher yield
For more information on root development:
Check out our article on "What is root binding?"
To see systems that optimize root development:
Check out our article on "What is air pruning technology?"
Why Are Standards Essential in Professional Production?
The greatest risk in commercial production is uncertainty.
Use of certified substrate:
Standardizes production processes
Minimizes risks
Delivers predictable performance
This also directly affects profitability.
Choosing a Reliable Substrate
Substrates certified by RHP and OMRI ensure quality and reliability in production.
Standardize Substrate Quality
Choose certified substrate solutions to achieve reliable results in professional production.
Frequently Asked Questions
What is the purpose of the RHP certificate?
It ensures that the substrate meets physical and chemical standards and is consistent.
Why is OMRI certification important?
It guarantees that the product is produced in accordance with organic standards.
Can uncertified substrate be used?
It can be used, but the production results become unpredictable.
