Peat moss and coco coir are the most used products in potting soil and seed starting mixes. Both peat and coir have benefits for gardeners, but they both have problems when it comes to sustainability and environmental impact. Coconut coir is often seen as a better alternative to peat, but that isn't necessarily accurate. Gardener Scott explains the similarities and differences of peat and coir in the garden and also tackles the harder questions of which is better for the environment and is more sustainable.