CoirProducts (www.coirproducts.co.uk) compressed coir coins are made of coir packed together tightly into pellets. They are 100% biodegradable and are ideal for sowing seeds or as a rooting medium for cuttings. Once water has been added to the discs, they swell up rapidly in the span of about 60 minutes to provide a greater area as a growing medium. The bags used to keep the coir peat together are biodegradable as well. CoirProducts (www.coirproducts.co.uk) coir coins are ideal to be used in farms, greenhouses, and gardens.