Sterile 3 lb Grain Spawn Bag for Mushroom Cultivation

3 lb Sterilized Milo Grain Spawn Bag – Injection Port Included

Start your mushroom cultivation with confidence using our 3 lb sterilized Milo grain spawn bag, engineered for clean inoculation and reliable mycelium growth. Each bag provides a nutrient-rich, fully sterilized grain medium—ready to use with a spore syringe or liquid culture.

What’s Included

Each grain spawn bag features:

• 3 lbs of premium Milo (sorghum) grain, carefully hydrated and sterilized
• Self-healing injection port for easy, contamination-free inoculation
• 0.2-micron filter patch to allow proper gas exchange while maintaining sterility

This combination creates an ideal environment for fast, even colonization.

Why Choose Milo (Sorghum) for Grain Spawn?

Milo is a trusted grain in mushroom cultivation due to its consistency, nutrition, and performance. Its small, uniform grain size and balanced moisture retention make it an excellent medium for mycelial expansion.

Lower Contamination Risk

Milo naturally carries fewer surface microbes and endospores than grains like wheat or rye, reducing the likelihood of contamination during colonization and improving success rates.

Faster, More Even Colonization

The small, uniform grains provide more inoculation points per bag, allowing mycelium to spread quickly and evenly. Each grain acts as a growth hub, leading to consistent colonization.

Nutrient-Rich Growth Medium

Milo is high in carbohydrates and essential nutrients, supplying steady energy for healthy mycelial development and strong performance when transferred to bulk substrate.

Excellent Moisture Retention

Milo holds moisture well without becoming overly wet. Its firm texture prevents clumping, making it easy to mix and ensuring even mycelium distribution throughout the bag.

Versatile and Reliable

Compatible with spore syringes, liquid cultures, and grain-to-grain transfers, Milo is a flexible option suitable for beginners and experienced growers alike.

Sterilization Process

Each bag is sterilized under controlled high-pressure conditions to eliminate contaminants. The grain is sealed in professional-grade bags with filter patches to maintain sterility until inoculation.

Colonization Tips

• Inoculate in a clean environment and wear gloves to reduce contamination
• Store the bag in a shaded area between 55–75°F (13–24°C)
• Once mycelium begins spreading, gently mix the bag (without opening) to promote even colonization
• Full colonization typically occurs within 2–4 weeks, depending on species and culture strength

Frequently Asked Questions

Do I need special tools to use this bag?
No special equipment is required. A spore syringe or liquid culture is sufficient. Gloves and a clean workspace are recommended.

How should I store the grain spawn bag?
Store at room temperature, away from direct sunlight. Refrigeration is not necessary. When stored properly, the bag remains viable for several months.

Why is Milo better than other grains?
Milo’s small size, nutrient density, and resistance to clumping promote fast, even mycelium growth with lower contamination risk.

Can I fruit mushrooms directly in this bag?
Yes, fruiting is possible, but these grain spawn bags are designed primarily for expansion into bulk substrate, which typically yields larger harvests.

How much spore solution should I use for a 3 lb bag?
We recommend 3–5 cc of spore solution or liquid culture. Too little may slow colonization, while too much can cause excess moisture.

Are these grain spawn bags reusable?
No. For consistent and contamination-free results, always start with a fresh, sterilized grain bag.

Are these bags compatible with liquid culture?
Yes. The injection port is designed for both liquid cultures and spore syringes.

Is this product legal to use?
Yes. These grain spawn bags are intended for lawful mushroom cultivation only and must be used in compliance with local regulations.

Notice

This product is intended for legal mushroom cultivation only.