Mycelium is the vegetative part of a fungus — the network of thread-like cells that spreads through soil, wood, or any organic substrate. It's the root system of mushrooms, but it's also far more. Mycelium decomposes organic matter, transports nutrients across ecosystems, and forms symbiotic relationships with plant roots.
In the last decade, researchers discovered that mycelium can be grown into solid objects. By filling a mould with agricultural waste (hemp, sawdust, corn husks) and inoculating it with fungal spores, the mycelium colonises the substrate, binds it together, and forms a dense, lightweight material.
The result is a grown, not manufactured product. No factory heat. No petroleum-based adhesives. No extrusion or moulding under pressure. The fungus does the work — growing into shape over a few days in a temperature-controlled environment.
Companies like Ecovative and Grown.bio are producing mycelium coasters, planters, lampshades, and packaging. At the end of its life, a mycelium product can be broken up and composted — it returns to soil in weeks.
For consumers, mycelium products represent a new category: goods that are genuinely biodegradable, made from waste streams, and produced with minimal energy. They're not plastic replacements — they're a different material paradigm entirely.