4 lb Sterilized Grain Spawn Bag | 4 Qt With Injection Port

🌾 4-Pound Sterilized Grain Spawn Bag — The Clean Start Every Grow Deserves

Give your mycelium the head start it deserves. Our 4-pound sterilized grain spawn bag (equal to 4 quarts) is packed with perfectly hydrated, nutrient-rich organic grain and sterilized in a cleanroom environment for total contamination control.

Each bag includes a self-healing injection port and 0.5-micron filter patch, letting you inoculate directly with spores or liquid culture — no extra equipment, no risk, just clean, vigorous growth.

The 4-quart size is ideal for spawning to bulk substrates like CVG (coir, vermiculite, gypsum) or for any other bulk substrate. Our mix delivers consistent moisture balance and rapid mycelial expansion.

Why cultivators love it:

4 lb (≈ 4 qt) bag — perfect for medium or multi-bag bulk grows

Fully sterilized grain for contamination-free inoculation

Self-healing injection port & filter patch for clean airflow

Ideal for pairing with CVG substrate for monotub setups

Made in a professional cleanroom for consistent results

Sterile. Simple. Reliable. Everything a strong grow should start with.