Blue Circle method
A transparent method, from requirement to score.
This page explains how Blue Circle certification works: what we assess, how we measure it, how the score is assigned and how the result is kept up to date over time.
Three requirement levels
Every requirement has a precise weight.
The Blue Circle algorithm weights each requirement and produces a final score: companies above the minimum score are certified.
Essential
Mandatory: non-compliance means the certification is not granted or is immediately suspended.
Qualifying
Contribute significantly to the facility's sustainability standards.
Secondary
Good practices for optimisation and continuous improvement.
The path
From requirement to mark, in eight steps.
- 01
Chapter 01
Why measure
In soilless farming almost everything is controllable: water, nutrients, energy, climate, batches. That is exactly why it can be measured and compared. Measuring shows where to improve and proves, with data, the value of a production model.
- 02
Chapter 02
Requirements
The Blue Circle standard defines the requirements applicable to recirculating soilless facilities — hydroponics, aquaponics, aeroponics and bioponics — centred on closed-loop water and nutrient management. Core requirements include closed-loop recirculation, IPM control and zero waste, animal welfare for aquaponics, and renewable energy sources. Applicable requirements are identified during assessment based on the type of system.
- 03
Chapter 03
Indicators
Every requirement is translated into measurable or verifiable indicators: quantities, records, the presence of procedures. Indicators make different companies comparable and make it possible to follow progress over time.
- 04
Chapter 04
Scores
Indicators are scored according to the Blue Circle methodology, which aggregates them per area and into an overall result. The score determines the outcome and gives the company a clear picture of strengths and room for improvement.
- 05
Chapter 05
Evidence
Statements must be supported by evidence: data, records, documents, instrument readings. The company collects them through the self-assessment form. Companies using Blue Circle Software already hold most of that evidence in organised form.
- 06
Chapter 06
Verification
Blue Circle assesses the form and the evidence and decides whether the certification is granted. Where necessary an on-site assessment can be arranged, with travel costs quoted separately.
- 07
Chapter 07
Certification
A positive outcome is followed by the contract, the invoicing of the fee, the creation of the CERTIFIED showcase on the portal, the activation of the software add-on package for those who use it, and delivery of the printed certificate. Certification grants the right to use the Blue Circle mark on products and on site.
- 08
Chapter 08
Keeping it up to date
The certification is valid for one year. The service fee for subsequent years includes the annual review, so information, score and showcase stay current and credible over time.
FAQ
Frequently asked questions about certification.
Want to know whether your company can be certified?
Book an introductory video call: we'll look at your facility and the applicable requirements together.