Spawn Carriers

Mushroom Spawn Substrate Options for Optimized Growth

For mushroom growers, the right products can improve profitability. Commercial production relies on selecting the right mushroom spawn substrate, and growers like you have options.

At Amycel and Spawn Mate, all of our innovative products are specially formulated and carefully produced to encourage faster and complete colonization in a wide range of growing systems. 

For purchases, please complete the order form on our mobile ordering app.

Mushroom Spawn Substrate Options for Optimized Growth

For mushroom growers, the right products can improve profitability. Commercial production relies on selecting the right mushroom spawn substrate, and growers like you have options.


At Amycel and Spawn Mate, all of our innovative products are specially formulated and carefully produced to encourage faster and complete colonization in a wide range of growing systems. 

For purchases, please complete the order form on our mobile ordering app.
 Collage of sliced brown mushrooms, a bag of millet for mushroom spawn, and a stack of petri dishes

Commercial Mushroom Growing Products You Can Trust

With the biggest mushroom research test facility in the world, Amycel and Spawn Mate is the global leader in substrate research and production.

Our research has led to the development of innovative spawn carriers and casing spawn that are specially designed to optimize your production, including our Exxpress product that helps minimize concerns about green mold. Our products are produced in a sterile environment under strict quality control protocols, reducing the risk of contaminants.

Gloved scientist examining petri dishes

Our Mushroom Spawn Carriers and Casing Spawn

Amycel offers three mushroom substrate options: millet, Express, and Onyxx. We also offer PAC, our premium casing spawn, for all of our strains.

Not all products are available for all strains. Please contact us for availability.

Our Mushroom Spawn Carriers and Casing Spawn

Amycel offers three mushroom substrate options: millet, Express, and Onyxx. We also offer PAC, our premium casing spawn, for all of our strains.

Not all products are available for all strains. Please contact us for availability.



White button mushroom

Spawn Carriers

Millet. Grain is the traditional carrier for mushroom mycelia and is used throughout the world. Millet for mushroom spawn is inoculated with pure mushroom culture and incubated under carefully controlled conditions. The small size of millet grain is ideal to ensure complete colonization in the compost.

Exxpress High-Performance Spawn Substrate. Amycel’s innovative synthetic spawn substrate provides growers with an alternative to traditional grain spawn. Exxpress typically runs faster than grain ensuring a complete spawn run. Faster spawn runs and Exxpress’ proprietary mix of ingredients help protect your crop against green mold.

Onyxx High-Performing Spawn Substrate. Onyxx is a hybrid substrate that combines the benefits of synthetic and grain spawns. It also runs faster in the compost than grain spawn and offers some protection to the crop against Trichoderma Green Mold.

Amycel's patented brown mushrooms

Spawn Carriers

Millet. Grain is the traditional carrier for mushroom mycelia and is used throughout the world. Millet for mushroom spawn is inoculated with pure mushroom culture and incubated under carefully controlled conditions. The small size of millet grain is ideal to ensure complete colonization in the compost.

Exxpress High-Performance Spawn Substrate. Amycel’s innovative synthetic spawn substrate provides growers with an alternative to traditional grain spawn. Exxpress typically runs faster than grain ensuring a complete spawn run. Faster spawn runs and Exxpress’ proprietary mix of ingredients help protect your crop against green mold.

Onyxx High-Performing Spawn Substrate. Onyxx is a hybrid substrate that combines the benefits of synthetic and grain spawns. It also runs faster in the compost than grain spawn and offers some protection to the crop against Trichoderma Green Mold.

Casing Spawn

PAC Casing Spawn. Casing spawn needs to be consistent and perform under a variety of conditions and soil moisture. Amycel’s premium casing spawn, PAC, combines high-quality compost and nutrients.

Casing Spawn

PAC Casing Spawn. Casing spawn needs to be consistent and perform under a variety of conditions and soil moisture. Amycel’s premium casing spawn, PAC, combines high-quality compost and nutrients.

We Can Help You Grow Your Business

Our entire team is committed to helping you grow your business from strain and substrate to the spawn delivered to your farm. Contact us today and find out how we can help you grow.