well, according to their website:
"6X Natural Fertiliser - a 100% natural organic fertiliser with a balanced pH of 6.8. It's environmentally friendly, contains no peat or chemicals and is oven heated at over 250°C to provide a sterilised, weed and pathogen free natural organic fertiliser. 6X Natural Fertiliser has been produced in the U.K. for over 40 years and is a fully tried, tested and trusted product. Since 6X Natural Fertiliser is six times richer than farmyard manure, it provides balanced nutrition for shrubs, flower beds, vegetables and lawns and is extraordinarily economical - one 15Kg sack of fibrous 6X Natural Fertiliser is sufficient to cover 180sq metres at lawn rate. For greater lawn areas and paddocks etc., it is also available in pelleted form for use in spreaders."