Topsoil is Dandy's award-winning, tried-and-true standard topsoil. It's perfect for laying turf or seeding grass seed because it's a natural sandy loam. Only Greenfield sites include this virgin, peat-free topsoil, which is then left fallow for several years to ensure optimum nutrition and fertility. We screen it down to around 14mm, leaving just under an inch of stones in there to keep the soil clean and draining.