Can I grow milky mushroom in the same unit I use for oyster mushroom?

Yes, in most cases you can use the same room, racks, boiler and spawning area for both, which is exactly why many growers pair oyster in cooler months with milky mushroom in the hot months to keep the unit busy year round. The main extra things milky mushroom needs are a casing soil layer and warmer fruiting temperatures, so you will add casing preparation to your routine and you may need humidity and ventilation control to handle the summer heat. Clean the room well between crops so leftover spores and pests from the oyster crop do not carry over. Keep your spawn source and substrate hygiene as careful as ever. This pairing is a practical way to use your investment fully, just plan the changeover and cleaning between the two crops.