Vermicompost (also called worm compost, vermicast, worm castings, worm humus or worm manure) is the end-product of the breakdown of organic matter by some species of earthworm. Vermicompost is a nutrient-rich, organic fertilizer and soil conditioner. The process of producing vermicompost is called vermicomposting. The earthworm species (or composting worms) most often used are Red Wigglers (Eisenia foetida) or Red Earthworms (Lumbricus rubellus). These species are commonly found in organic rich soils throughout Europe & North America and especially prefer the special conditions in rotting vegetation, compost & manure piles. Composting worms are available from nursery mail-order suppliers or angling (fishing) shops where they are sold as bait. Small-scale vermicomposting is well-suited to turn kitchen waste into high-quality soil, where space is limited.