OUR BEST-SELLING PREMIUM CVG SUBSTRATE FOR MAXIMUM YIELDS

This Sterilised CVG Mushroom Substrate Bag, produced by our trusted partners at Martian Mushrooms, provides a high-quality, ready-to-use growing medium designed to support fast, healthy mycelium growth and strong harvests.

Made from a premium blend of coco coir, vermiculite and gypsum, this substrate offers excellent moisture retention and nutrient availability while helping to minimise the risk of contamination.

Each bag is optimally hydrated to field capacity and sterilised in a computer-controlled industrial autoclave, ensuring consistent quality and reliable results.

There is no need for complex setups or specialist equipment — simply mix with fully colonised grain spawn and you’re ready to grow.

Suitable for growers of all experience levels, this substrate makes it easy to produce fresh mushrooms at home, including varieties that are difficult to find in shops.

THE BENEFITS

🍄 Premium coco coir, vermiculite & gypsum (CVG) blend
⚡ Supports rapid colonisation and healthy mycelium growth
🔗 Designed to pair perfectly with sterilised grain spawn
✨ Beginner-friendly and easy to use
🏡 Requires little space and remains discreet
🛡️ Backed by Martian Mushrooms’ guarantee – produces mushrooms or the product will be replaced

HOW TO USE

Spawning:
Mix substrate with fully colonised grain spawn at approximately a 2:1 substrate-to-spawn ratio (ideally in a Monotub or suitable container).

Colonisation:
Allow to colonise for around 10–14 days in warm, dark conditions.

Fruiting:
Once fully colonised, introduce fresh air and light. Pins typically appear within 7–14 days.

INGREDIENTS

Premium blend of coco coir, vermiculite and gypsum.
Carefully hydrated to field capacity and sterilised in a computer-controlled steam autoclave.

WHAT’S INCLUDED

3kg Sterilised CVG Mushroom Substrate Bag (depending on selection)
Martian Mushrooms’ Guarantee