The responsible sourcing calculator
The UK horticultural industry actively seeks to improve its sustainability wherever possible. As part of this, the industry has examined its sourcing of growing media and drafted the responsible sourcing scheme to enable manufacturers and users of growing media to understand and measure how their choice of growing media materials impacts on seven criteria:
- energy use
- water use
- social compliance
- habitat and biodiversity
- resource use efficiency
The criteria have been defined as being able to differentiate more responsibly sourced from less responsibly sourced material. It will enable users of the scheme to source materials more responsibly, which we hope will help to improve the sustainability of this part of their businesses.
Some of the decision criteria may appear arbitrary, but they have been chosen to account for complicated and variable situations, which can include global supply chains.Click to download the calculator
Click to download the guidance notes (December 2020)
Anaerobic digestate Worked Example
The following supporting documents for the caluclator are available:P4 Decision trees document
Social compliance ingredient rater v5
Annex 2 - self assessment questionnaire minimum requirements
Note re using the calculator
When using the calculator it may be necessary for you to apply a Microsoft Excel fix to correct an upgrade carried out by Microsoft in 2014. This will vary depending on which version of Office you are using.
If you find that you are unable to progress back through the workbook, this will indicate that the patch is required.
The fix can be found by clicking on the following link: