Compressed Coconut Fiber Block

Coconut coir is a versatile growing medium used by mushroom growers as the base component of CVG (coconut coir–vermiculite–gypsum) substrates, particularly for the cultivation of medicinal mushrooms.

It is also used:

• in horticulture as an alternative to peat for seedlings, cuttings, or soilless cultivation

• for transplanting exotic plants or in aquaponics (with or without soil amendments)

• as a natural bedding material for reptiles or insects, thanks to its ability to retain moisture

Our coconut coir block (or coconut peat) is made from coconut husks sourced from sustainable agriculture. A 100% renewable and biodegradable resource, it is guaranteed to be free of chemical additives. Its fibrous, uniform texture creates an ideal environment for mycelium growth.

Coconut coir naturally contains trace amounts of magnesium and calcium, which support optimal mushroom growth.

✔️ Superior quality – ISO 9001:2015 certified: We select coconut fiber blocks from ISO 9001:2015-certified manufacturers ISO 9001:2015, ensuring rigorous quality controland consistent product quality , and a commitment to continuous improvement. This ensures you receive a reliable substrate that meets international quality standards.

💡 Benefits of coconut coir: Naturally mold-resistant, coconut coir is an airy, lightweight growing medium that is easy to store and prepare. It retains moisture effectively, promoting rapid root establishment.

📦 Contents: a compressed block weighing approximately 650g that yields 8 to 9 liters of growing medium once rehydrated with 3.5 liters of water.

🛠️ Usage

For a balanced CVG substrate, follow this recipe:

• 1 block of coconut coir (650 g)
• 8 cups of dry vermiculite (300 g)
• 1 cup of gypsum (100 g)
• 16 cups (3 to 3.5 L) of boiling water (99°C for pasteurization)

Place the ingredients in a bucket, pour in the boiling water, seal tightly, and let sit. You can also cover the bucket with a blanket to extend the pasteurization time. Work in a clean area. After 6 to 8 hours of cooling, stir vigorously to blend thoroughly.

The growing medium should be at "field capacity": when you squeeze a handful, it should hold together in a clump and release only a few drops of water. Be sure to wash your hands thoroughly with soap before touching the growing medium.

🍄 Recommended vaccination

Use a 1:4 ratio:
→ 1 part grain-based mycelium to 4 parts substrate.
Higher ratios (1:3 or 1:2) are possible but increase costs without providing a significant benefit for most species.

Cultivation of piopino mushrooms on CVG substrates.

Use in casing

The casing is a thin protective layer applied to a substrate that has been completely colonized by mycelium. Unlike the substrate, it does not provide nutrients, but plays a vital role in maintaining stable humidity and stimulating the formation of pins (the early stages of mushroom growth).

’scoconutcoir is ideal for this purpose: when applied in a thin layer (0.5 to 1.5 cm) over a well-established substrate that already has pins , it creates a moist and well-ventilated environment that promotes fruiting abundant and consistentfruiting .
We recommend pasteurizing the coconut coir before use by rehydrating it with boiling water to reduce the risk of contamination. Always wear protective gloves to avoid burns during this process.

📌 Technical notes

Although coconut fiber is naturally resistant to contaminants, it is still an organic material that contains nutrients. Pasteurization is therefore recommended to minimize the risk of fungal or bacterial contamination. If you add materials rich in sugars (grains) or nitrogen (such as manure), we even recommend sterilizing the substrate in an autoclave or pressure cooker.

What about perlite? It isn’t useful for growing mushrooms using coconut coir-based substrates. However, perlite can be used in the fruiting chamber to maintain humidity level (in a monotub humidity level , for example). It is sterile, neutral, and excellent at absorbing water.

🚫 This product is not intended for human consumption.

This growing medium is designed exclusively for mushroom cultivation. It is commonly used by mushroom growers for the production of exotic and medicinal mushrooms in home, educational, or research settings.

La Mycosphère products must be used solely for lawful purposes. La Mycosphère does not endorse the cultivation of psilocybin (Psilocybe cubensis) or hallucinogenic mushrooms (“magic mushrooms”) in countries or jurisdictions where such activities are prohibited by law.