Some time ago I created a website for the UK’s leading and first (I believe) hydroseeding company CDTS Ltd. Hydroseeding basically amounts to spraying a specially selected mixture of seeds suspended in a nutrient-rich solution on to any tract of brownfield land that you wish to convert into green fields with flowers and grasses. CDTS have used it to great effect all over the UK, specifically beautifying motorway cuttings, brownfield sites and the entrance/exit to the Channel Tunnel. Take a look at their site to find out more about the whole process of hydroseeding (sometimes called hydraseeding).