Description

Sterilized Popcorn Grain Spawn Bag – 3lb for Mushroom Cultivation

Out-Grow’s Sterilized Popcorn Grain Spawn Bag – 3lb is a lab-prepared, high-performance substrate designed for fast colonization and consistent results. Popcorn is a popular choice among mushroom cultivators due to its excellent moisture retention and structure, making it ideal for vigorous mycelial expansion across many gourmet and medicinal mushroom species.

3lb Mushroom Grain Spawn Bag with Injection Port and Filter Patch

Each grain spawn bag contains approximately 3 quarts of fully hydrated popcorn grain, sterilized at 15 PSI in our commercial mycology laboratory. The bag is sealed with a self-healing injection port for clean, convenient inoculation and includes a 5-micron filter patch to allow for proper gas exchange during colonization. This professional setup helps reduce contamination risk and supports strong, uniform mycelium growth from the start.

Fast-Colonizing Substrate for High-Yield Mushroom Grows

Popcorn’s larger grain size and high moisture capacity create an ideal environment for fast mycelial takeover. This 3lb sterilized grain spawn bag can be used to inoculate 10 to 15 pounds of bulk substrate, making it a great option for cultivators scaling up without compromising on substrate quality. It's well-suited for species that thrive on high-moisture, cleanly structured grains.

Trusted by Growers Nationwide Since 2010

For over 15 years, Out-Grow has provided lab-prepared mushroom substrates trusted by home cultivators, educators, and commercial operations alike. Use this popcorn grain spawn bag fresh for best results, or store in its original packaging in a cool, dry place for up to one month.

Order today and grow with confidence using sterilized popcorn grain spawn from Out-Grow — your trusted source for premium mushroom cultivation supplies.