Multi Grain Mushroom Substrate Jars 12-Pack

Multi Grain Mushroom Substrate Jars 12-Pack

The Multi Grain Mushroom Substrate Jars 12-Pack provides a versatile and nutrient-rich bulk substrate solution for mushroom cultivators. Each jar is filled with a fully hydrated and sterilized mix of popcorn, red milo, and rye berries, offering an ideal environment for vigorous mycelium growth.

Each jar is equipped with a self-healing injection port for contamination-free inoculation and a 5-micron filter patch for optimal gas exchange. Perfect for large-scale grows or those looking to stock up, this bulk mushroom substrate pack ensures consistent, high-quality results.

Whether you’re growing a variety of mushrooms or focusing on specific species, these 1-quart jars are designed to support multiple mushroom flushes and healthy growth.

Click here to learn how to use this product.

Other sizes and formats

• Multi Grain Mushroom Substrate Bag - 1lb — $7.73
• Multi Grain Mushroom Substrate Jar 1qt — $11.28
• Multi Grain Mushroom Substrate Bag - 3lb — $19.52

See all grain bags

What you'll need with it

• Spawn it into a bulk substrate — manure, pasteurized straw or hardwood
• Growing button or portobello? You also need casing soil

Guides

• How to use Multi Grain Mushroom Substrate Jars 12-Pack
• Simple substrate recipes
• Preventing mould
• Which substrate suits which mushroom

Work out how much you need · Free shipping over $150.