Premium Coir Brick (650g)
Premium Coir Brick (650g) is backordered and will ship as soon as it is back in stock.
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Description
Description
Premium Coco Coir Brick 650g – OMRI Organic Low EC Mushroom Substrate (Expands to 10 Quarts)
The 650g Premium Coco Coir Brick is a compact, high-performance growing medium designed for mushroom cultivation, small monotubs, and gardening projects. Triple-cleaned, OMRI-listed organic, and pH balanced, this compressed coir brick expands to approximately 10 quarts (2.5+ gallons) of fluffy, moisture-rich substrate when hydrated.
Perfect for test batches, small bulk grows, CVG substrate preparation, and home gardening, this brick delivers the same professional-grade quality as larger commercial sizes — in a convenient, space-saving format.
Why Growers Choose This 650g Coco Coir Brick
- Optimized for Mushroom Substrate – Excellent base for CVG blends and bulk monotub grows
- Expands to ~10 Quarts – Ideal volume for small fruiting chambers or trial batches
- OMRI Listed Organic – Approved for organic growing
- Low EC & pH Balanced – Reduced salt content supports strong colonization
- Excellent Water Retention & Aeration – Maintains proper field capacity
- Clean & Sustainable – 100% natural coconut coir, no additives
Perfect for Small Monotubs & CVG Substrate
This 650g coco coir brick is commonly used in CVG substrate recipes (Coco Coir, Vermiculite, Gypsum) and smaller bulk substrate mixes. Its natural resistance to mold and bacterial contamination makes it one of the most reliable foundations in mycology.
Whether you’re running a 28Q monotub, preparing a casing layer, or testing a new grain spawn batch, this brick provides consistent hydration and structure.
Volume & Expansion
| Compressed Weight | 650 grams |
| Expanded Volume | ~10 Quarts (2.5+ Gallons) |
| Best For | Small monotubs, trial runs, seed starting, home grows |
How to Use
- Place brick in a clean container.
- Add hot water gradually.
- Allow full hydration and expansion.
- Mix to proper field capacity.
- Use alone or blend with vermiculite and gypsum for CVG substrate.
Technical Specifications
| Material | 100% Coconut Coir |
| Certification | OMRI Listed Organic |
| pH Range | Approx. 5.8 – 6.5 (Neutral) |
| Electrical Conductivity | Low EC |
| Use Cases | Mushroom substrate, CVG blends, hydroponics, soil conditioning |
| Skill Level | Beginner to Advanced |
Real Results from Small-Scale Growers
This 650g coco coir brick is perfect for growers who want precision and efficiency without excess material. Reliable expansion, clean processing, and consistent moisture retention make it a dependable base for high-performance mushroom cultivation.


