Coast of Maine Fundy Enriching Mulch Kelp 1cf. Coast of Maine Organic Products Fundy Blend Enriching Mulch with Kelp is made from barks (birch, maple and hemlock) and a blend of kelp solids and sphagnum moss peat to create an almost black humus that is rich in organic matter. It helps retain moisture in the soil and can be dug into the beds in the fall to improve the organic content of the soil.