"Active" Mushroom Casing Layer 10lb Bag

Premium Casing Layer Mix – 10 lb Unicorn T3 Bag

Create a stable, moisture-retentive surface environment with Mighty Mycelium’s Premium Casing Layer Mix. Inspired by classic Jiffy-style peat and vermiculite casing formulas, this blend includes a higher percentage of coco coir for improved moisture retention, an airy texture, and more forgiving surface conditions.

The balanced combination of peat moss, coco coir, vermiculite, gypsum, and lime spreads easily across trays, tubs, and other cultivation containers. Vermiculite helps keep the casing light and breathable, while the buffered peat-and-coco base supports consistent moisture and a healthy surface microclimate.

Formula

• 50% Coco Coir – improves moisture retention and structure

• 25% Vermiculite – keeps the casing airy and breathable

• 20% Peat Moss – provides a traditional casing-layer foundation

• 3% Gypsum – supports texture and mineral balance

• 2% Lime – helps buffer and stabilize pH

Why Growers Like It

• Holds surface moisture without becoming overly dense

• Supports a humid, evenly hydrated microclimate

• Spreads smoothly for consistent top-layer coverage

• Balanced, airy texture for easy application

• pH-buffered for more stable surface conditions

• Prepared and ready to apply

Each order contains 10 pounds of prepared casing mix, conveniently packaged in a durable Unicorn T3 filter-patch bag.

Feed your mycelium like a champion with a casing layer designed for dependable moisture, airflow, and surface coverage.