Penicillium is a generalist and worldwide distributed saprotroph. This fungus is known for thriving under most conditions due to its rich suite of secondary metabolites and other characteristics that makes it a successful competitor. Pencillium is often used in the industry of food and drug production but we know little about its life in the soil or its ecological niche. As we gain a more thorough understanding of the role of soil fungi in the decomposition of soil organic matter, genomes of wild isolates of Penicillium are a good tool to study this group of fungi in the context of organic matter decay and cycling of nutrients in the soil.