WeedBlock® Biodegradable Mulch is made from 100% post-consumer recycled paper, contains no chemicals and is OMRI Listed® safe for use in organic production. It is an ideal solution for use in seasonal beds and gardens. The thick, absorbent paper blocks weeds and helps conserve moisture. WeedBlock® Biodegradable Mulch can be tilled back into the soil, putting nutrients back where they are needed.