Take your mushroom growing experience to the next level with Out-Grow's Sterilized Popcorn Quart Jar, the gold standard for creating highly effective mushroom spawn. Specifically designed for superior mushroom cultivation, this quart jar is filled with meticulously prepared popcorn substrate, celebrated for its exceptional moisture-holding capabilities.

Unlike alternative substrates, our sterilized popcorn undergoes a strict sterilization process that effectively eliminates the risk of contamination. This makes it an ideal choice for both amateur and veteran mushroom cultivators seeking a reliable and effective substrate for a variety of gourmet mushroom strains. Every jar comes with a state-of-the-art 5-micron filter patch and a self-healing injection port, features that significantly enhance the ease and success of the inoculation process.

What sets our popcorn substrate apart is its unmatched moisture retention quality, offering an environment conducive to robust mycelial growth and prolonged spawn viability. This quality not only sets the stage for abundant mushroom yields but also allows for long-term storage and even spawn-to-substrate transfers.

Whether you're a hobbyist looking to delve into diverse mushroom species or a commercial grower aiming to maximize yield, our Sterilized Popcorn Quart Jar offers the durability, efficiency, and versatility you need. Experience firsthand the convenience and yield-boosting power of our premium popcorn substrate and make the smart choice for your mushroom cultivation projects.