Planters&rsquo; Pride CRP042F0 Fiber Grow Coconut Coir Refill, 1000 Pellets Fiber Grow is made from coir, a highly renewable resource In addition coir has the capacity to absorb more water and retain it for longer periods than peat products The mesh liner on Fiber Grow pellets is also made from natural ingredients Fiber grow coconut coir pellet refill Biodegradable pellets are dried and compressed in a secure, fine mesh netting Pellets are universal and fit all Planter's pride fiber grow pellet greenhouse kits Less mold growth than peat based pots and pellets