Bulk Substrates

Common materials used to grow mushrooms at scale. Each one supports different species and environments.

Masters mix blocks

Compressed hardwood sawdust and soy hull blocks — nutrient-rich and ideal for gourmet mushrooms.

Sawdust bags

Hardwood sawdust packed into filter patch bags — perfect for wood-loving species like shiitake.

Straw buckets

Pasteurized straw in buckets with side holes — simple, low-tech method for oyster mushrooms.

Straw tubes

Plastic sleeves filled with straw and spawn — great for vertical growing and high yields.

Coco coir & vermiculite

Moisture-retentive mix for beginner growers — supports species like cubensis in monotubs.