The phrase refers to the availability and sourcing of composted material resulting from commercial mushroom cultivation in a specific geographic location. This substance, rich in organic matter, is a byproduct of the mushroom farming process. Examples of its usage include individuals seeking to amend garden soil or improve landscaping projects within their locality.
This composted material offers significant advantages as a soil amendment. Its composition enhances soil structure, improves water retention, and provides a slow-release source of nutrients beneficial for plant growth. Historically, it has been recognized as a valuable resource by gardeners and agriculturalists for enriching soil fertility and promoting healthy plant development.