Description

Sterilized Popcorn Grain Spawn Bag – 5lb for Mushroom Cultivation

Out-Grow’s Sterilized Popcorn Grain Spawn Bag – 5lb is a high-capacity mushroom substrate designed for growers who want fast colonization and consistent performance. Popcorn is a preferred grain for its ability to absorb and retain high moisture content, creating an ideal environment for vigorous mycelium expansion and reliable inoculation results.

5lb Mushroom Grain Spawn Bag with Injection Port and Filter Patch

Each 5lb popcorn grain spawn bag is filled with fully hydrated, lab-sterilized grain and sealed in a professional grow bag. It features a self-healing injection port for easy inoculation with spore syringes or liquid culture, and a 5-micron filter patch to allow proper gas exchange without risking contamination. This combination supports rapid colonization and strong yields for a wide range of gourmet and medicinal mushroom species.

Professionally Prepared Popcorn Substrate for Serious Cultivators

Prepared in Out-Grow’s commercial mycology laboratory, this sterilized popcorn grain spawn is processed at 15 PSI to eliminate contaminants and ensure optimal hydration. The large grain size and high moisture retention of popcorn make it a powerful option for growers who want speed, reliability, and substrate integrity in one package. Each bag contains approximately 5 quarts of substrate and is ideal for inoculating medium to large bulk grows.

Trusted by Mushroom Growers Since 2010

With more than 15 years of experience supplying sterilized grain spawn to commercial growers, educators, and home cultivators, Out-Grow is a name trusted nationwide. This 5lb popcorn grain spawn bag is best used fresh for peak results, but can be stored in its original packaging for up to one month in a cool, dry location.

Order today and experience the speed, strength, and consistency of professional popcorn grain spawn from Out-Grow.