Your gateway to clean, healthy, and viable commercial-quality mycelium at a below-standard market value—sometimes even free!

GrowFresh is committed to making high-quality mycology accessible to growers of all levels.

Whether you’re a hobbyist or a commercial cultivator, Mycro Masters gives you a versatile and cost-effective way to start and expand your mushroom production.

Precision Mycology, One Vial At a Time

Each vial contains a carefully prepared and viable mycelium culture, ready to be expanded into liquid culture, agar plates, or grain spawn. Our mission is to provide a reliable and affordable way to access high-quality genetics without the typical market costs.

How It Works

1. Storage: Keep your vial refrigerated (unless noted) if not using immediately. Avoid freezing.

2. Opening: Sterilize the vial cap with 70% iso before opening to minimize contamination.

3. Inoculation: Transfer a small amount of mycelium to agar or liquid culture under sterile conditions

4. Expansion: Once your culture is growing well, use it to inoculate grain spawn or other substrates.

5. Store your myco master properly. seasonally transfer to a new Mycro Master, usually a different type of agar.

Basic Instructions

We are continuously developing detailed blog posts covering advanced techniques, troubleshooting, and creative ways to use Mycro Masters. Stay tuned for upcoming content, including:

• How to Expand Your Mycro Master to Liquid Culture

• Making Grain Spawn from a Mycro Master

• Long-Term Storage & Preservation Tips

• Creative Uses for Mycro Masters in Commercial Cultivation

Learn More in upcoming blogs published below