Video narration
How can a handful of straw turn into a mushroom crop? Think of preparing a pot for a plant: first, you make a suitable place for growth. Here, the growing medium is wheat or paddy straw, not soil, and the work begins in a clean, airy, cool place. But straw does not grow mushrooms by itself. It must be soaked and pasteurized, then mixed with spawn-the material that starts mushroom growth. The prepared mixture goes into bags or trays. After that, care still matters. Keep temperature and humidity suitable throughout its growth; one set of notes gives roughly eighty to ninety percent humidity, not a universal setting. Over time, small mushrooms appear, and you harvest them once they have developed. So the answer is a managed growing bed: prepared straw, spawn, and the right conditions, carried through to harvest.