Those who count earthworms among their closest friends in the garden should know quite a bit about them. Helmut Schimmel has been dedicated to the care and breeding of compost worms, as well as the production of valuable worm humus, for many years. His team works with the earthworm species Eisenia foetida. These small worms are indispensable in humus production. They play a crucial role in improving soil fertility. Worm composting is also an excellent alternative to conventional composting methods, which generally suffer from significant energy losses. The earthworm plays a vital role in composting as well. Together with the vast army of microorganisms, it is the true hero underground, the ultimate soil creator, not only in the wild but also in the garden.