Organic Soil Additives Have Received RHP Certification
New soil improvers for growers may help reduce nitrate fertilization requirements while supporting soil health.
Updated on Sept. 28, 2026 in Organic Food
Live Poll
Do you believe agricultural businesses should prioritize organic soil improvers over traditional chemical fertilizers?
REKA has received RHP certification for its Vidi Funda and Vidi FunCal organic soil improvers. The certification confirms that these products meet quality standards across the entire production chain, from raw material extraction to final delivery.
Why it matters
These products aim to improve soil structure and promote healthy microbial activity, which may help growers maintain productivity while optimizing nutrient application. Certification provides a standardized benchmark for growers selecting substrate components.
Field trials demonstrated that combining Vidi FunCal with substrate allowed for a 60% reduction in nitrate fertilization compared to standard usage. The certification process verifies strict parameters including water absorption, air content, pH, electrical conductivity, and nutrient levels.
The players
REKA
A developer of organic soil improvers including Vidi Funda and Vidi FunCal.
RHP
A European knowledge center that monitors quality and certification standards for growing media substrates.
The details
The Vidi Funda and Vidi FunCal products are formulated from plant-based and marine raw materials that include natural sources of phosphorus and potassium. By activating soil biology, these improvers foster a healthy balance of fungi to bacteria. Vidi FunCal additionally provides a regulated release of calcium over 10 weeks, while both products release nitrogen over an 8-week period to support sustained plant growth.
Timeline
RHP became Europe's leading knowledge center for substrates in 1963.
REKA announced the RHP certification for its two products in September 2026.
Health Landscape
The RHP certification serves as a standardized quality framework for substrates across Europe. This development integrates with ongoing efforts to optimize nutrient management in cultivation through controlled-release technology.
For consumers interested in organic produce, these tools represent a move toward more precise and potentially reduced chemical inputs in professional cultivation. Discussing sustainable farming practices and the role of certified soil amendments with local growers can provide insight into the standards used for your food supply.
The takeaway
The certification of these soil improvers reflects a growing emphasis on managing soil biology to maintain yields with fewer nitrate inputs. Growers and stakeholders can monitor the efficacy of these materials by tracking nutrient release cycles and plant health metrics over the standard growing season.
Further reading
Learn more about sustainable farming practices in our Organic Food section.
Source note: This article includes information reported by Horti Daily.
Live Poll
Do you believe agricultural businesses should prioritize organic soil improvers over traditional chemical fertilizers?
