Portobello Mushroom Grain Spawn (1 pound)

Premium grain spawn cultured on 100% organic rye berries, featuring our professional-grade Portobello strain. Specially formulated for commercial and home cultivation. Key Features: Fast colonization rates (7-21 days) 30-day shelf life at room temperature 6-month refrigerated shelf life 100% organic rye berry base Professional-grade genetics Contamination-free guarantee Cultivation Requirements: Composted substrate required Temperature: 65-75°F for incubation 10°F temperature drop for fruiting Casing layer essential Humidity: 80-90% Controlled environment CO2 management critical Expansion Ratios: 1:5 spawn to compost ratio Even mixing required Multiple break-and-shake points Day 3 and Day 7 mixing recommended Storage Instructions: Store in dark place during incubation Maintain 85°F during colonization Avoid sealed plastic containers Use breathable cardboard boxes Keep accessible for periodic mixing Monitor for contamination regularly Market Appeal: High market demand Restauran