30mm Gourmet Mushroom Spawn Caps [Grey]

Elevate your gourmet harvests with these pro-grade caps. Designed for spawn bags and slower-colonizing species (Shiitake, Lion’s Mane, Reishi), the smaller filter area maintains higher CO₂ and moisture for stronger mycelial runs.

Key Features:

• Autoclavable & Reusable: Heat-resistant PP withstands full sterilization cycles..
• Secure Lock Ring: Tight seal prevents contaminants while allowing essential gas exchange.
• Optimized for Gourmets: Smaller filter suits protein-enriched substrates and extended colonization.
• Easy Installation: Fill bag, pull through ring, insert cap – sterilize and inoculate.
• Pro Fruiting Tip: Pull cap post-colonization for localized pinning – bigger mushrooms & multiple flushes with better moisture retention.

Why Choose This Over Oyster Caps? Unlike larger-bore Oyster caps, this 30mm version slows gas exchange for delicate gourmets or spawn – reducing drying, enhancing CO₂ and promoting dense, healthy growth.

Invest in reliability – streamline your process and boost yields!