Peat has long been a major ingredient in UK horticulture, but with its use declining and public interest in sustainable alternatives rising, there is increasing demand for clear, trustworthy information about growing media. A Responsible Sourcing Scheme (RSS) has been developed to help consumers understand the environmental impact of compost products through an A–E rating system. To support Scottish Government decision-making on future peat policy, a short review assessed the strengths and limitations of the RSS calculator.