King Trumpet Mushroom Spawn

King Trumpet (Pleurotus eryngii) grain spawn grown on organic millet in our HEPA-filtered cleanroom facility in Brantford, Ontario.

King Trumpet is one of the most commercially valuable gourmet mushrooms in the world. It produces thick, dense, meaty stems with small tan caps — a texture often compared to scallops or abalone when seared. Unlike other oyster mushrooms that fruit from the sides of substrate blocks, King Trumpet fruits best from the top of supplemented sawdust blocks in controlled environments.

Growing Notes: King Trumpet requires more precise fruiting conditions than standard oyster mushrooms. It prefers cooler temperatures (12-18°C), high humidity (85-95%), and good fresh air exchange. Fruits best on supplemented hardwood sawdust (masters mix or hardwood + soy hull). Allow 2-3 weeks for full colonization before initiating fruiting. Expect 2-3 flushes per block.

Culinary Profile: King Trumpet is a chef's mushroom. The thick stems can be sliced into medallions and seared like scallops, grilled whole, or shredded for pulled-mushroom dishes. It has a mild, savory umami flavor with a firm, almost crispy texture when properly cooked. One of the highest-value mushrooms at farmers' markets and for restaurant accounts.

Commercial Potential: King Trumpet commands premium pricing ($12-18/lb retail) and has excellent shelf life compared to other oyster species. The thick stems ship well without damage, making it ideal for wholesale accounts and market sales.

What's Included: One 5 lb bag of King Trumpet grain spawn on organic millet. Ready to use — break up the bag, mix into your supplemented hardwood substrate, and seal in grow bags. One bag inoculates approximately 25-40 lbs of substrate at a 10-15% spawn rate.